JP2002263492A - Iridium supporting material, iridium supporting method and iridium supporting catalyst - Google Patents
Iridium supporting material, iridium supporting method and iridium supporting catalystInfo
- Publication number
- JP2002263492A JP2002263492A JP2001071318A JP2001071318A JP2002263492A JP 2002263492 A JP2002263492 A JP 2002263492A JP 2001071318 A JP2001071318 A JP 2001071318A JP 2001071318 A JP2001071318 A JP 2001071318A JP 2002263492 A JP2002263492 A JP 2002263492A
- Authority
- JP
- Japan
- Prior art keywords
- iridium
- solution
- carrier
- adjusting
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052741 iridium Inorganic materials 0.000 title claims abstract description 77
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000003054 catalyst Substances 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 title abstract description 8
- 239000000243 solution Substances 0.000 claims description 86
- 239000000126 substance Substances 0.000 claims description 82
- 150000002504 iridium compounds Chemical class 0.000 claims description 40
- 239000007864 aqueous solution Substances 0.000 claims description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 30
- 239000000460 chlorine Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 229910052801 chlorine Inorganic materials 0.000 claims description 18
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 17
- 239000003960 organic solvent Substances 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000010304 firing Methods 0.000 claims description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 10
- 230000002776 aggregation Effects 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 238000004220 aggregation Methods 0.000 claims description 9
- 239000003130 blood coagulation factor inhibitor Substances 0.000 claims description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 8
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052787 antimony Inorganic materials 0.000 claims description 8
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 8
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- 229910052733 gallium Inorganic materials 0.000 claims description 8
- 229910052732 germanium Inorganic materials 0.000 claims description 8
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052738 indium Inorganic materials 0.000 claims description 8
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 8
- 239000003112 inhibitor Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052746 lanthanum Inorganic materials 0.000 claims description 8
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 239000011733 molybdenum Substances 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- CPRMKOQKXYSDML-UHFFFAOYSA-M rubidium hydroxide Chemical compound [OH-].[Rb+] CPRMKOQKXYSDML-UHFFFAOYSA-M 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- 229910052720 vanadium Inorganic materials 0.000 claims description 8
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052762 osmium Inorganic materials 0.000 claims description 4
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 239000001509 sodium citrate Substances 0.000 claims description 4
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 239000010955 niobium Substances 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052713 technetium Inorganic materials 0.000 claims description 3
- GKLVYJBZJHMRIY-UHFFFAOYSA-N technetium atom Chemical compound [Tc] GKLVYJBZJHMRIY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052716 thallium Inorganic materials 0.000 claims description 3
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims description 3
- PLSARIKBYIPYPF-UHFFFAOYSA-H trimagnesium dicitrate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O PLSARIKBYIPYPF-UHFFFAOYSA-H 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 241001392754 Calliostoma iridium Species 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 25
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 16
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 16
- 229910044991 metal oxide Inorganic materials 0.000 description 14
- 150000004706 metal oxides Chemical class 0.000 description 14
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 239000012298 atmosphere Substances 0.000 description 11
- 230000003197 catalytic effect Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 6
- 238000011068 loading method Methods 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- -1 IrCl 4 Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- IUJMNDNTFMJNEL-UHFFFAOYSA-K iridium(3+);trihydroxide Chemical compound [OH-].[OH-].[OH-].[Ir+3] IUJMNDNTFMJNEL-UHFFFAOYSA-K 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910006404 SnO 2 Inorganic materials 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910001887 tin oxide Inorganic materials 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000010718 Oxidation Activity Effects 0.000 description 3
- JZQOJFLIJNRDHK-CMDGGOBGSA-N alpha-irone Chemical compound CC1CC=C(C)C(\C=C\C(C)=O)C1(C)C JZQOJFLIJNRDHK-CMDGGOBGSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 229910000428 cobalt oxide Inorganic materials 0.000 description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 102100032566 Carbonic anhydrase-related protein 10 Human genes 0.000 description 1
- 101100321669 Fagopyrum esculentum FA02 gene Proteins 0.000 description 1
- 101000867836 Homo sapiens Carbonic anhydrase-related protein 10 Proteins 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Natural products CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】イリジウム金属を金属酸化物
担体、炭素系物質などに担持したイリジウム担持物質、
イリジウム担持方法並びに一酸化炭素の酸化触媒および
悪臭物質分解触媒に関する。TECHNICAL FIELD The present invention relates to an iridium-supporting substance in which iridium metal is supported on a metal oxide carrier, a carbon-based substance, or the like.
The present invention relates to a method for supporting iridium, a catalyst for oxidizing carbon monoxide, and a catalyst for decomposing malodorous substances.
【０００２】[0002]
【従来の技術】白金やイリジウムなどの貴金属担持触媒
は、反応物質によって表面が被毒されたり、酸化される
ことによって、触媒反応中に触媒活性が劣化してしまう
ことが知られている。しかしながら、そのような触媒活
性の劣化を抑制することは、非常に困難である。2. Description of the Related Art It is known that a catalyst supporting a noble metal such as platinum or iridium deteriorates its catalytic activity during the catalytic reaction due to its surface being poisoned or oxidized by a reactant. However, it is very difficult to suppress such deterioration of the catalytic activity.
【０００３】また、調製時に混入する不純物などによっ
て触媒劣化がさらに促進されてしまうことがある。例え
ば、アルミナやシリカなどをイリジウム化合物水溶液に
導入し、水を除去してイリジウムを担持させる従来法
(含浸法)では、原料であるイリジウム化合物に含まれる
塩素などの元素も同時に担体に担持されてしまうので、
このような元素による触媒特性の劣化などが重大な問題
となっている。[0003] In addition, catalyst deterioration may be further promoted by impurities mixed during preparation. For example, a conventional method in which alumina or silica is introduced into an iridium compound aqueous solution and water is removed to support iridium.
In the (impregnation method), elements such as chlorine contained in the iridium compound as the raw material are also supported on the carrier at the same time.
Deterioration of catalyst characteristics due to such elements has become a serious problem.
【０００４】このように、イリジウム金属を均一に分散
した状態で担体に安定に担持でき、且つClなどの不純物
の担持を抑制できるIr担持方法が必要とされている。As described above, there is a need for an Ir loading method capable of stably loading iridium metal on a carrier in a uniformly dispersed state and suppressing loading of impurities such as Cl.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、従来技術の
問題点を鑑み成されたものであって、主として、Clなど
の不純物をなるべく含まないようにイリジウムを担持す
る方法、イリジウム担持物質およびイリジウム担持触媒
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and is mainly concerned with a method for supporting iridium so as to contain impurities such as Cl as little as possible, an iridium-supporting material, and a method for supporting iridium. An object is to provide an iridium-supported catalyst.
【０００６】[0006]
【問題を解決するための手段】本発明者は、上記した如
き従来技術の問題点を鑑みて、金属酸化物などの担体上
にClなどの不純物を含まないようイリジウムを担持させ
る方法について鋭意研究を重ねてきた。SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present inventor has conducted intensive studies on a method of supporting iridium on a carrier such as a metal oxide so that impurities such as Cl are not contained. Has been repeated.
【０００７】発明者は、イリジウム化合物を溶解させた
アルカリ性水溶液中における沈殿生成・溶解反応、担体
表面への吸着などに注目して、水溶液のｐＨ値とイリジ
ウム水溶性塩やその他の添加物の添加方法を特定の条件
にする方法、Clを含まないIr化合物をIr原料として用い
る方法などによって調製した場合には、Clなどの不純物
の担持をなるべく抑制し、且つイリジウム金属を微粒子
または微粒子が凝集することによって生成した均一な薄
膜として担持できることを見いだした。[0007] The inventors of the present invention focused on the precipitation and dissolution reaction in an alkaline aqueous solution in which an iridium compound was dissolved, adsorption on the surface of a carrier, and the like. When prepared by a method of setting the method to a specific condition, a method of using an Ir compound containing no Cl as an Ir raw material, loading of impurities such as Cl is suppressed as much as possible, and fine particles or fine particles of iridium metal are aggregated. It has been found that it can be supported as a uniform thin film formed by this.
【０００８】また、得られたイリジウム担持物質の一部
は、一酸化炭素の酸化触媒、悪臭物質の分解触媒として
極めて有用であることを見いだし、ここに本発明を完成
するに至った。Further, the inventors have found that a part of the obtained iridium-carrying substance is extremely useful as a catalyst for oxidizing carbon monoxide and a catalyst for decomposing malodorous substances, and thus completed the present invention.
【０００９】即ち、本発明は、以下のイリジウム担持物
質、イリジウム担持方法およびイリジウム担持触媒に係
るものである。 １．担体にイリジウムを担持したイリジウム担持物質で
あって、塩素含有量が、100ppm以下であるイリジウム担
持物質。 ２．(a)イリジウム化合物水溶液にpH調整液を徐々に滴
下することによってpHを7〜11に調整し、この溶液に前
記pH範囲を維持しつつ担体を含浸させた後、または(b)
イリジウム化合物水溶液に予め担体を含浸させ、これに
pH調整液を徐々に滴下してpHを7〜11に調整した後、得
られた物質を水洗し、200〜500℃で焼成することにより
得られるイリジウム担持物質。 ３．(a)イリジウム化合物水溶液にpH調整液を徐々に滴
下することによってpHを6〜11に調整し、この溶液に前
記pH範囲を維持しつつ担体を含浸させた後、または(b)
イリジウム化合物水溶液に予め担体を含浸させ、これに
pH調整液を徐々に滴下してpHを6〜11に調整した後、凝
集抑制剤溶液を滴下し、得られた物質を水洗し、200〜5
00℃で焼成することにより得られるイリジウム担持物
質。 ４．Clを含まないIr化合物を有機溶媒に溶解し、得られ
た溶液に担体を含浸させ、有機溶媒を除去後、得られた
物質を200〜500℃で焼成することにより得られるイリジ
ウム担持物質。 ５．担体が、(１)マグネシウム、アルミニウム、珪素、
チタン、バナジウム、クロム、マンガン、鉄、コバル
ト、ニッケル、銅、亜鉛、ガリウム、ゲルマニウム、ス
トロンチウム、イットリウム、ジルコニウム、ニオブ、
モリブデン、テクネチウム、ルテニウム、ロジウム、パ
ラジウム、銀、カドミウム、インジウム、錫、アンチモ
ン、バリウム、ランタン、ハフニウム、タリウム、タン
グステン、レニウム、オスミウム、イリジウムおよび白
金からなる群から選択される少なくとも１種の金属の酸
化物、或いは(２)活性炭または活性炭素繊維である上記
１〜４のいずれかに記載のイリジウム担持物質。 ６．(a)イリジウム化合物水溶液にpH調整液を徐々に滴
下することによってpHを7〜11に調整し、この溶液に前
記pH範囲を維持しつつ担体を含浸させた後、または(b)
イリジウム化合物水溶液に予め担体を含浸させ、これに
pH調整液を徐々に滴下してpHを7〜11に調整した後、得
られた物質を水洗し、200〜500℃で焼成するイリジウム
担持方法。 ７．(a)イリジウム化合物水溶液にpH調整液を徐々に滴
下することによってpHを6〜11に調整し、この溶液に前
記pH範囲を維持しつつ担体を含浸させた後、または(b)
イリジウム化合物水溶液に予め担体を含浸させ、これに
pH調整液を徐々に滴下してpHを6〜11に調整した後、凝
集抑制剤溶液を滴下し、得られた物質を水洗し、200〜5
00℃で焼成するイリジウム担持方法。 ８．イリジウム化合物が、IrCl4, IrCl3および(NH4)2Ir
Cl6からなる群から選択される少なくとも一種の水溶性
化合物である上記６または７に記載のイリジウム担持方
法。 ９．pH調整液が、NaOH, LiOH, RbOHおよびKOHからなる
群から選択される少なくとも一種の化合物の水溶液また
はアンモニア水である上記６〜８のいずれかに記載のイ
リジウム担持方法。 １０．凝集抑制剤溶液が、クエン酸ナトリウムまたは二
クエン酸三マグネシウムの溶液である上記７〜９のいず
れかに記載の方法。 １１．Clを含まないIr化合物を有機溶媒に溶解し、得ら
れた溶液に担体を含浸させ、有機溶媒を除去後、得られ
た物質を200〜500℃で焼成するイリジウム担持方法。 １２．一酸化炭素から二酸化炭素への酸化触媒であっ
て、アルミニウム、珪素、チタン、バナジウム、ガリウ
ム、ゲルマニウム、モリブデン、インジウム、錫、アン
チモン、ランタン、タングステン、ビスマス、鉄、マン
ガンおよびコバルトからなる群から選択される少なくと
も１種の金属の酸化物にイリジウム金属を担持したイリ
ジウム金属担持酸化物からなり、0〜150℃で一酸化炭素
を二酸化炭素へ酸化可能な触媒。 １３．悪臭物質を分解する触媒であって、アルミニウ
ム、珪素、チタン、バナジウム、ガリウム、ゲルマニウ
ム、モリブデン、インジウム、錫、アンチモン、ランタ
ン、タングステン、ビスマス、鉄、マンガンおよびコバ
ルトからなる群から選択される少なくとも１種の金属の
酸化物にイリジウム金属を担持したイリジウム金属担持
酸化物からなり、25〜300℃で悪臭物質を分解可能な触
媒。That is, the present invention relates to the following iridium-supporting substance, iridium-supporting method, and iridium-supporting catalyst. 1. An iridium-carrying substance having iridium supported on a carrier, wherein the iridium-carrying substance has a chlorine content of 100 ppm or less. 2. (a) The pH is adjusted to 7 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and after impregnating the carrier with the solution while maintaining the pH range, or (b)
The carrier is impregnated in advance with an aqueous iridium compound solution,
An iridium-carrying substance obtained by gradually dropping a pH adjusting solution to adjust the pH to 7 to 11, washing the obtained substance with water, and baking at 200 to 500 ° C. 3. (a) adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or (b)
The carrier is impregnated in advance with an aqueous iridium compound solution,
After gradually adjusting the pH to 6 to 11 by dropping a pH adjusting solution, the coagulation inhibitor solution is dropped, and the obtained substance is washed with water, and 200 to 5
An iridium-carrying substance obtained by baking at 00 ° C. 4. An iridium-carrying substance obtained by dissolving a Cl-free Ir compound in an organic solvent, impregnating the resulting solution with a carrier, removing the organic solvent, and calcining the resulting substance at 200 to 500 ° C. 5. The carrier is (1) magnesium, aluminum, silicon,
Titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, germanium, strontium, yttrium, zirconium, niobium,
Molybdenum, technetium, ruthenium, rhodium, palladium, silver, cadmium, indium, tin, antimony, barium, lanthanum, hafnium, thallium, tungsten, rhenium, osmium, osmium, iridium, and at least one metal selected from the group consisting of platinum 5. The iridium-supporting substance according to any one of the above items 1 to 4, which is an oxide or (2) activated carbon or activated carbon fiber. 6. (a) The pH is adjusted to 7 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and after impregnating the carrier with the solution while maintaining the pH range, or (b)
The carrier is impregnated in advance with an aqueous iridium compound solution,
An iridium-supporting method in which the pH is adjusted to 7 to 11 by dropping a pH adjusting solution gradually, and the obtained substance is washed with water and calcined at 200 to 500 ° C. 7. (a) adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or (b)
The carrier is impregnated in advance with an aqueous iridium compound solution,
After gradually adjusting the pH to 6 to 11 by dropping a pH adjusting solution, the coagulation inhibitor solution is dropped, and the obtained substance is washed with water, and 200 to 5
An iridium supporting method of firing at 00 ° C. 8. Iridium compounds are IrCl 4 , IrCl 3 and (NH 4 ) 2 Ir
Iridium loading method according to the above 6 or 7 at least one water soluble compound selected from the group consisting of Cl 6. 9. The iridium loading method according to any one of the above 6 to 8, wherein the pH adjusting solution is an aqueous solution of at least one compound selected from the group consisting of NaOH, LiOH, RbOH and KOH or aqueous ammonia. 10. The method according to any one of the above 7 to 9, wherein the aggregation inhibitor solution is a solution of sodium citrate or trimagnesium dicitrate. 11. An iridium-supporting method in which a Cl-free Ir compound is dissolved in an organic solvent, the obtained solution is impregnated with a carrier, the organic solvent is removed, and the obtained substance is calcined at 200 to 500 ° C. 12. A catalyst for oxidation of carbon monoxide to carbon dioxide, selected from the group consisting of aluminum, silicon, titanium, vanadium, gallium, germanium, molybdenum, indium, tin, antimony, lanthanum, tungsten, bismuth, iron, manganese and cobalt A catalyst comprising an iridium metal-supported oxide obtained by supporting iridium metal on at least one metal oxide, and capable of oxidizing carbon monoxide to carbon dioxide at 0 to 150 ° C. 13. A catalyst for decomposing malodorous substances, comprising at least one selected from the group consisting of aluminum, silicon, titanium, vanadium, gallium, germanium, molybdenum, indium, tin, antimony, lanthanum, tungsten, bismuth, iron, manganese and cobalt. A catalyst consisting of an iridium metal-supported oxide in which iridium metal is supported on an oxide of a certain metal, and capable of decomposing malodorous substances at 25 to 300 ° C.
【００１０】[0010]
【発明の実施の形態】本発明は、塩素含有量が、約100p
pm以下であるイリジウム担持物質に係る。塩素含有量
は、イリジウムと担体との総量に対する重量比であり、
好ましくは、約80ppm以下である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a chlorine content of about 100 p.
It relates to an iridium-carrying substance that is not more than pm. The chlorine content is a weight ratio to the total amount of iridium and the carrier,
Preferably, it is less than about 80 ppm.
【００１１】本発明のイリジウム担持物質は、担体とし
て、金属酸化物、炭素系物質などを用いることができ
る。金属酸化物としては、マグネシウム、アルミニウ
ム、珪素、チタン、バナジウム、クロム、マンガン、
鉄、コバルト、ニッケル、銅、亜鉛、ガリウム、ゲルマ
ニウム、ストロンチウム、イットリウム、ジルコニウ
ム、ニオブ、モリブデン、テクネチウム、ルテニウム、
ロジウム、パラジウム、銀、カドミウム、インジウム、
錫、アンチモン、バリウム、ランタン、ハフニウム、タ
リウム、タングステン、レニウム、オスミウム、イリジ
ウム、白金などの金属の酸化物を例示できる。炭素系物
質としては、活性炭、活性炭素繊維などを例示できる。The iridium-carrying substance of the present invention can use a metal oxide, a carbon-based substance or the like as a carrier. As metal oxides, magnesium, aluminum, silicon, titanium, vanadium, chromium, manganese,
Iron, cobalt, nickel, copper, zinc, gallium, germanium, strontium, yttrium, zirconium, niobium, molybdenum, technetium, ruthenium,
Rhodium, palladium, silver, cadmium, indium,
Examples include oxides of metals such as tin, antimony, barium, lanthanum, hafnium, thallium, tungsten, rhenium, osmium, iridium, and platinum. Examples of the carbon-based material include activated carbon and activated carbon fiber.
【００１２】担体としては、金属酸化物が好ましい。金
属酸化物の中では、チタン酸化物、酸化鉄、アルミナ、
酸化スズ、酸化マンガン、酸化コバルトなどが好まし
く、TiO2(ルチル、アナターゼ、これらの混合物を含
む), Al2O3(特にγアルミナ), Fe2O3(特にα酸化鉄), S
nO2, Mn2O3, Co3O4などがより好ましく、TiO2, Al2O
3(特にγアルミナ), SnO2などが特に好ましい。As the carrier, a metal oxide is preferred. Among metal oxides, titanium oxide, iron oxide, alumina,
Preferred are tin oxide, manganese oxide, cobalt oxide, etc., TiO 2 (including rutile, anatase, and mixtures thereof), Al 2 O 3 (especially γ-alumina), Fe 2 O 3 (especially α-iron oxide), S
nO 2 , Mn 2 O 3 , Co 3 O 4 and the like are more preferable, and TiO 2 , Al 2 O
3 (especially γ-alumina), SnO 2 and the like are particularly preferred.
【００１３】本発明では、特に表面積の大きい担体が好
ましい。担体の比表面積は、特に制限されないが、通常
約30m2/g以上、好ましくは50〜1200m2/g程度である。な
お、比表面積の値は、BET法による測定値とする。In the present invention, a carrier having a particularly large surface area is preferred. The specific surface area of the support is not particularly limited, usually about 30 m 2 / g or more, preferably 50~1200m 2 / g approximately. The value of the specific surface area is a value measured by the BET method.
【００１４】担体の形状は、特に限定はされず、粉体で
もよく、或いは各種の形状に成形して用いてもよい。例
えば、予めハニカム、ペレットなどに成形したものを、
担体として用いてもよい。あるいは、金属製の発泡体な
どをハニカム、ペレットなどに成形した支持体上に担体
を担持した状態で用いることもできる。The shape of the carrier is not particularly limited, and it may be a powder or may be used after being formed into various shapes. For example, honeycomb, pellets, etc.
It may be used as a carrier. Alternatively, a metal foam or the like can be used in a state where the carrier is supported on a support formed into a honeycomb, a pellet, or the like.
【００１５】本発明のイリジウム担持物質の比表面積
は、特に制限されないが、通常約30m2/g以上、好ましく
は50〜1200m2/g程度である。[0015] The specific surface area of iridium support material of the present invention is not particularly limited, usually about 30 m 2 / g or more, preferably 50~1200m 2 / g approximately.
【００１６】本発明のイリジウム担持物質に担持されて
いるイリジウムは、粒状、粒子が凝集した薄膜状などと
なっている。粒状となっている場合、Irの平均粒子径
は、特に制限されないが、通常1〜5nm程度、好ましくは
1〜3nm程度である。なお、平均粒子径は、透過型電子顕
微鏡を用いた観察により得た値とする。粒子が凝集して
薄膜状となっている場合、膜厚は、特に制限されない
が、通常1〜5nm程度、好ましくは2〜3nm程度である。The iridium supported on the iridium-supporting substance of the present invention is in the form of particles, a thin film in which particles are aggregated, or the like. When in the form of particles, the average particle diameter of Ir is not particularly limited, but is usually about 1 to 5 nm, preferably
It is about 1-3 nm. The average particle diameter is a value obtained by observation using a transmission electron microscope. When the particles are aggregated to form a thin film, the thickness is not particularly limited, but is usually about 1 to 5 nm, preferably about 2 to 3 nm.
【００１７】本発明のイリジウム担持物質は、以下に挙
げる第一方法、第二方法、第三方法などによって調製す
ることができる。The iridium-carrying substance of the present invention can be prepared by the following first method, second method, third method and the like.
【００１８】(I)第一方法： (a)イリジウム化合物水溶液にpH調整液を徐々に滴下す
ることによってpHを7〜11程度(好ましくは7〜8程度)に
調整し、この溶液に前記pH範囲を維持しつつ担体を含浸
させた後、または(b)イリジウム化合物水溶液に予め担
体を含浸させ、これにpH調整液を徐々に滴下してpHを7
〜11程度(好ましくは7〜8程度)に調整した後、得られた
物質を水洗し、200〜500℃程度で焼成することによって
イリジウムを担体に担持させる。(I) First method: (a) The pH is adjusted to about 7 to 11 (preferably about 7 to 8) by gradually dropping a pH adjusting solution into an aqueous iridium compound solution. After the carrier is impregnated while maintaining the range, or (b) the carrier is impregnated in advance with an iridium compound aqueous solution, and a pH adjusting solution is gradually added dropwise to the carrier to adjust the pH to 7.
After adjusting to about 11 (preferably about 7 to 8), the obtained substance is washed with water and calcined at about 200 to 500 ° C. to support iridium on the carrier.
【００１９】(II)第二方法： (a)イリジウム化合物水溶液にpH調整液を徐々に滴下す
ることによってpHを6〜11程度(好ましくは7〜8程度)に
調整し、この溶液に前記pH範囲を維持しつつ担体を含浸
させた後に、または(b)イリジウム化合物水溶液に予め
担体を含浸させ、これにpH調整液を徐々に滴下してpHを
6〜11程度(好ましくは7〜8程度)に調整した後に、凝集
抑制剤溶液を滴下し、得られた物質を水洗し、200〜500
℃程度で焼成することによってイリジウムを担体に担持
させる。(II) Second method: (a) The pH is adjusted to about 6 to 11 (preferably about 7 to 8) by gradually dropping a pH adjusting solution into an aqueous iridium compound solution. After the carrier is impregnated while maintaining the range, or (b) the carrier is previously impregnated with the iridium compound aqueous solution, and a pH adjusting solution is gradually added dropwise thereto to adjust the pH.
After adjusting to about 6 to 11 (preferably about 7 to 8), the coagulation inhibitor solution is dropped, the obtained substance is washed with water, and 200 to 500
Iridium is supported on the carrier by firing at about ° C.
【００２０】(III)第三方法：Clを含まないIr化合物を
有機溶媒に溶解し、得られた溶液に担体を含浸させ、有
機溶媒を除去後、得られた物質を200〜500℃程度で焼成
することによってイリジウムを担体に担持させる。(III) Third method: An Ir compound containing no Cl is dissolved in an organic solvent, the resulting solution is impregnated with a carrier, and after removing the organic solvent, the obtained substance is heated at about 200 to 500 ° C. Iridium is supported on the carrier by firing.
【００２１】以下、先ず、第一方法について詳細に説明
する。First, the first method will be described in detail.
【００２２】第一方法とは、以下のような方法である。The first method is the following method.
【００２３】(a)イリジウム化合物水溶液にpH調整液を
徐々に滴下することによってpHを7〜11程度(好ましくは
7〜8程度)に調整し、この溶液に前記pH範囲を維持しつ
つ担体を含浸させた後、または(b)イリジウム化合物水
溶液に予め担体を含浸させ、これにpH調整液を徐々に滴
下してpHを7〜11程度(好ましくは7〜8程度)に調整した
後、得られた物質を水洗し、200〜500℃程度で焼成する
ことによってイリジウムを担体に担持させる。(A) The pH is adjusted to about 7 to 11 (preferably, by gradually dropping a pH adjusting solution into the aqueous iridium compound solution).
(About 7 to 8), after impregnating the carrier with this solution while maintaining the pH range, or (b) impregnating the carrier in advance with an iridium compound aqueous solution, and then gradually dropping the pH adjusting solution thereto. After adjusting the pH to about 7 to 11 (preferably about 7 to 8), the obtained substance is washed with water and calcined at about 200 to 500 ° C., so that iridium is supported on the carrier.
【００２４】担体を含浸させるのは、pH調整後の方が好
ましい。即ち、上記(a)と(b)では、(a)の方が好まし
い。The carrier is preferably impregnated after pH adjustment. That is, in the above (a) and (b), (a) is more preferable.
【００２５】イリジウム原料であるイリジウム化合物と
して、IrCl4, IrCl3, (NH4)2IrCl6などの水溶性イリジ
ウム化合物を用いることができる。As the iridium compound as the iridium raw material, a water-soluble iridium compound such as IrCl 4 , IrCl 3 , (NH 4 ) 2 IrCl 6 can be used.
【００２６】イリジウム化合物含有水溶液の濃度は、特
に制限されないが、1×10-3〜1×10 -5mol/l程度とする
ことが適当であり、1×10-3〜1×10-4mol/l程度とする
ことがより適当である。The concentration of the iridium compound-containing aqueous solution is
Not limited to, but 1 × 10-3~ 1 × 10 -Fivemol / l
Is appropriate, 1 × 10-3~ 1 × 10-Fourmol / l
Is more appropriate.
【００２７】担体を含浸させる時のイリジウム化合物含
有水溶液の液温は、特に制限されないが、0〜80℃程度
が適当である。The temperature of the iridium compound-containing aqueous solution when the carrier is impregnated is not particularly limited, but is suitably about 0 to 80 ° C.
【００２８】pH調整液としては、NaOH, LiOH, RbOH, KO
Hなどの化合物の水溶液、アンモニア水などが使用でき
る。これらのなかでは、NaOH, KOHが好ましい。pH調整
液の濃度は、特に制限されないが、通常1×10-1〜1×10
-3mol/l程度である。pH調整液は、溶液中で急激に水酸
化イリジウムが析出しないように徐々に滴下する必要が
ある。pH調整液の滴下時間は、通常1〜80分程度、好ま
しくは40〜70分程度である。Examples of the pH adjusting solution include NaOH, LiOH, RbOH, KO
An aqueous solution of a compound such as H or aqueous ammonia can be used. Of these, NaOH and KOH are preferred. The concentration of the pH adjusting solution is not particularly limited, but is usually 1 × 10 -1 to 1 × 10
It is about -3 mol / l. It is necessary to gradually add the pH adjusting solution dropwise so that iridium hydroxide does not rapidly precipitate in the solution. The dropping time of the pH adjusting solution is usually about 1 to 80 minutes, preferably about 40 to 70 minutes.
【００２９】上記のようにpHを調整することによって、
担体表面(多孔体の場合には細孔表面を含む)にイリジウ
ム前駆体(水酸化イリジウム)が担持される。得られた水
酸化イリジウム担持物質は、次の焼成工程に供する前
に、水を用いて洗浄する。水洗方法は、特に制限されな
い。例えば、得られた物質を水中で撹拌する方法などを
例示することができる。より好ましい水洗方法として、
洗液のpHが一定になるまで何度か水洗を繰り返す方法を
例示できる。By adjusting the pH as described above,
An iridium precursor (iridium hydroxide) is supported on the carrier surface (including the pore surface in the case of a porous body). The obtained iridium hydroxide-carrying substance is washed with water before being subjected to the next baking step. The washing method is not particularly limited. For example, a method of stirring the obtained substance in water can be exemplified. As a more preferred washing method,
A method of repeating water washing several times until the pH of the washing solution becomes constant can be exemplified.
【００３０】水洗後、酸化雰囲気下、還元雰囲気下など
において、200〜500℃程度、好ましくは200〜400℃程度
で焼成する。加熱時間などの焼成条件は、特に制限され
ないが、加熱時間は、通常1〜6時間程度であり、好まし
くは2〜4時間程度である。後述する第二方法により得ら
れた触媒の場合にも、同様の方法で焼成することが望ま
しい。After washing with water, calcination is performed at about 200 to 500 ° C., preferably about 200 to 400 ° C. in an oxidizing atmosphere, a reducing atmosphere, or the like. The firing conditions such as the heating time are not particularly limited, but the heating time is usually about 1 to 6 hours, preferably about 2 to 4 hours. In the case of a catalyst obtained by the second method described below, it is desirable to perform calcination by the same method.
【００３１】なお、得られたイリジウム担持物質を触媒
として使用する直前に、触媒の使用温度以上程度であっ
て、上記の焼成条件と同様の条件下において加熱処理を
施してもよい。後述する第二方法および第三方法におい
て得られた触媒の場合にも、触媒として使用する直前に
同様の熱処理を施してもよい。Immediately before using the obtained iridium-carrying substance as a catalyst, a heat treatment may be performed at a temperature not lower than the use temperature of the catalyst and under the same conditions as the above calcination conditions. In the case of the catalyst obtained by the second method and the third method described below, the same heat treatment may be performed immediately before use as a catalyst.
【００３２】また、触媒として使用する前に公知の方法
を用いて触媒を活性化させてもよい。触媒を活性化させ
る方法として、例えば、水素を含む雰囲気下などにおい
て、200〜500℃程度(好ましくは200〜300℃程度)で、1
〜6時間(好ましくは2〜4時間程度)加熱処理する方法を
例示することができる。後述する第二方法及び第三方法
により得られた触媒の場合にも、同様の方法で触媒の活
性化をすることができる。Before use as a catalyst, the catalyst may be activated using a known method. As a method for activating the catalyst, for example, under an atmosphere containing hydrogen, at about 200 to 500 ° C. (preferably about 200 to 300 ° C.),
A heat treatment method for up to 6 hours (preferably about 2 to 4 hours) can be exemplified. In the case of the catalyst obtained by the second method and the third method described below, the catalyst can be activated by the same method.
【００３３】次に、第二方法について述べる。第二方法
は、以下のような方法である。 (a)イリジウム化合物水溶液にpH調整液を徐々に滴下す
ることによってpHを6〜11程度(好ましくは7〜8程度)に
調整し、この溶液に前記pH範囲を維持しつつ担体を含浸
させた後に、または(b)イリジウム化合物水溶液に予め
担体を含浸させ、これにpH調整液を徐々に滴下してpHを
6〜11程度(好ましくは7〜8程度)に調整した後に、凝集
抑制剤溶液を滴下し、得られた物質を水洗し、200〜500
℃程度で焼成することによってイリジウムを担体に担持
させる。Next, the second method will be described. The second method is as follows. (a) The pH was adjusted to about 6 to 11 (preferably about 7 to 8) by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and the carrier was impregnated with the solution while maintaining the pH range. Later or (b) the iridium compound aqueous solution is impregnated with the carrier in advance, and the pH adjusting solution is gradually added dropwise thereto to adjust the pH.
After adjusting to about 6 to 11 (preferably about 7 to 8), the coagulation inhibitor solution is added dropwise, the obtained substance is washed with water, and 200 to 500
Iridium is supported on the carrier by firing at about ° C.
【００３４】担体を含浸させるのは、pH調整後の方が好
ましい。即ち、上記(a)と(b)では、(a)の方が好まし
い。The impregnation of the carrier is preferably performed after pH adjustment. That is, in the above (a) and (b), (a) is more preferable.
【００３５】イリジウム原料であるイリジウム化合物と
して、IrCl4, IrCl3, (NH4)2IrCl6などの水溶性イリジ
ウム化合物を用いることができる。As the iridium compound as the iridium raw material, a water-soluble iridium compound such as IrCl 4 , IrCl 3 , (NH 4 ) 2 IrCl 6 can be used.
【００３６】このイリジウム化合物の濃度は、特に制限
されないが、1×10-3〜1×10-5mol/l程度とすることが
適当であり、1×10-3〜1×10-4mol/l程度とすることが
より適当である。The concentration of the iridium compound is not particularly limited, but is suitably about 1 × 10 −3 to 1 × 10 −5 mol / l, and is preferably about 1 × 10 −3 to 1 × 10 −4 mol / l. It is more appropriate to be about / l.
【００３７】担体を含浸させる時のイリジウム化合物含
有水溶液の液温は、特に制限されないが、0〜80℃程度
が適当である。The temperature of the aqueous solution containing the iridium compound when the carrier is impregnated is not particularly limited, but is preferably about 0 to 80 ° C.
【００３８】pH調整液としては、NaOH, LiOH, RbOH, KO
Hなどの化合物の水溶液、アンモニア水などが使用でき
る。これらのなかでは、NaOH, KOHが好ましい。pH調整
液の濃度は、特に制限されないが、通常1×10-1〜1×10
-3mol/l程度である。pH調整液は、溶液中で急激に水酸
化イリジウムが析出しないように徐々に滴下する必要が
ある。pH調整液の滴下時間は、通常1〜80分程度、好ま
しくは40〜70分程度である。Examples of the pH adjusting solution include NaOH, LiOH, RbOH, KO
An aqueous solution of a compound such as H or aqueous ammonia can be used. Of these, NaOH and KOH are preferred. The concentration of the pH adjusting solution is not particularly limited, but is usually 1 × 10 -1 to 1 × 10
It is about -3 mol / l. It is necessary to gradually add the pH adjusting solution dropwise so that iridium hydroxide does not rapidly precipitate in the solution. The dropping time of the pH adjusting solution is usually about 1 to 80 minutes, preferably about 40 to 70 minutes.
【００３９】第二方法では、凝集抑制剤の添加によって
担体表面(担体が多孔体である場合には、細孔表面を含
む)に水酸化イリジウムが凝集することを抑制する。In the second method, aggregation of iridium hydroxide on the surface of the carrier (including the surface of the pores when the carrier is porous) is suppressed by adding an aggregation inhibitor.
【００４０】凝集抑制剤としては、クエン酸ナトリウ
ム、二クエン酸三マグネシウムなどが使用できる。凝集
抑制剤は、例えば、水溶液として用いることができる。
凝集抑制剤溶液の濃度は、特に制限されないが、通常1
×10-2〜1×10-3mol/l程度である。As the aggregation inhibitor, sodium citrate, trimagnesium dicitrate and the like can be used. The aggregation inhibitor can be used, for example, as an aqueous solution.
The concentration of the aggregation inhibitor solution is not particularly limited, but is usually 1
It is about × 10 -2 to 1 × 10 −3 mol / l.
【００４１】凝集抑制剤溶液の添加量は、凝集抑制剤の
モル数がイリジウム化合物水溶液に含まれるイリジウム
イオンのモル数の1.5〜10倍程度とすることが適当であ
り、2〜4倍程度がより適当である。凝集抑制剤溶液は、
徐々に滴下してもよく、一度に添加してもよい。凝集抑
制剤の滴下時間は、通常1〜4分程度、好ましくは1〜2分
程度である。The amount of the coagulation inhibitor solution to be added is suitably about 1.5 to 10 times the number of moles of iridium ions contained in the aqueous iridium compound solution, and about 2 to 4 times the number of moles of the iridium ion contained in the iridium compound aqueous solution. More appropriate. The coagulation inhibitor solution is
It may be added dropwise gradually or may be added all at once. The dropping time of the aggregation inhibitor is usually about 1 to 4 minutes, preferably about 1 to 2 minutes.
【００４２】凝集抑制剤の添加によりpHが変化する場合
があるので、凝集抑制剤溶液の添加と同時に上述のpH調
整液を滴下して、ｐＨを所定の範囲に保持することが望
ましい。Since the pH may be changed by the addition of the coagulation inhibitor, it is desirable to maintain the pH in a predetermined range by dropping the above-mentioned pH adjusting solution simultaneously with the addition of the coagulation inhibitor solution.
【００４３】得られた水酸化イリジウム担持物質は、次
の焼成工程に供する前に水を用いて洗浄する。水洗方法
は、特に制限されない。例えば、得られた物質を水中で
撹拌する方法などを例示することができる。より好まし
い水洗方法として、洗液のpHが一定になるまで何度か水
洗を繰り返す方法を例示できる。The obtained iridium hydroxide-carrying substance is washed with water before being subjected to the next baking step. The washing method is not particularly limited. For example, a method of stirring the obtained substance in water can be exemplified. As a more preferable washing method, a method of repeating washing several times until the pH of the washing solution becomes constant can be exemplified.
【００４４】水洗後、上述した第一方法と同様に、酸化
雰囲気下、還元雰囲気下などにおいて、200〜500℃程
度、好ましくは200〜400℃程度で焼成する。After washing with water, firing is performed at about 200 to 500 ° C., preferably about 200 to 400 ° C. in an oxidizing atmosphere, a reducing atmosphere, or the like, as in the first method described above.
【００４５】次に、第三方法について述べる。第三方法
は、以下のような方法である。Next, the third method will be described. The third method is as follows.
【００４６】Clを含まないIr化合物を有機溶媒に溶解
し、得られた溶液に担体を含浸させ、有機溶媒を除去し
て得られた物質を200〜500℃程度で焼成することによっ
てイリジウムを担体に担持させる。An Ir compound containing no Cl is dissolved in an organic solvent, the resulting solution is impregnated with a carrier, the organic solvent is removed, and the resulting material is calcined at about 200 to 500 ° C. to convert the iridium into the carrier. Supported on.
【００４７】Clを含まないIr化合物として、例えば、Ir
(acac)3, (C3H5)3Irなどを例示することができる(aca
c-:アセチルアセトン陰イオン)。これらのなかでは、Ir
(acac) 3が好ましい。As an Ir compound containing no Cl, for example, Ir
(acac)Three, (CThreeHFive)ThreeIr etc. (aca
c-: Acetylacetone anion). Of these, Ir
(acac) ThreeIs preferred.
【００４８】用いる有機溶媒として、メタノール、エタ
ノール、プロパノール、アセトン、アセトニトリル、こ
れらの混合物などを例示できる。Examples of the organic solvent used include methanol, ethanol, propanol, acetone, acetonitrile, and mixtures thereof.
【００４９】担体をClを含まないIr化合物溶液に含浸さ
せる。含浸させる時間は、特に制限されないが、通常1
〜24時間程度、好ましくは6〜12時間程度である。The carrier is impregnated with a Cl-free Ir compound solution. The time for impregnation is not particularly limited, but is usually 1
About 24 hours, preferably about 6 to 12 hours.
【００５０】含浸後、有機溶媒を除去する。有機溶媒の
除去方法は、特に制限されない。例えば、混合物をエバ
ポレーターにかけることによって、有機溶媒を除去する
方法、濾取した物質を必要に応じて乾燥する方法などを
例示できる。有機溶媒を除去する際には、必要に応じて
加熱してもよい。加熱温度は、特に制限されないが、通
常10〜80℃程度、好ましくは30〜60℃程度である。After the impregnation, the organic solvent is removed. The method for removing the organic solvent is not particularly limited. For example, a method of removing the organic solvent by subjecting the mixture to an evaporator, a method of drying a filtered substance as necessary, and the like can be exemplified. When removing the organic solvent, heating may be performed as necessary. The heating temperature is not particularly limited, but is usually about 10 to 80 ° C, preferably about 30 to 60 ° C.
【００５１】得られた物質を酸化雰囲気下、還元雰囲気
下などで焼成する。焼成条件は、特に制限されない。焼
成温度は、通常200〜500℃程度、好ましくは300〜400℃
程度である。焼成時間は、通常1〜8時間程度、好ましく
は2〜4時間程度である。The obtained substance is fired in an oxidizing atmosphere, a reducing atmosphere, or the like. The firing conditions are not particularly limited. The firing temperature is usually about 200 to 500 ° C, preferably 300 to 400 ° C.
It is about. The firing time is usually about 1 to 8 hours, preferably about 2 to 4 hours.
【００５２】本発明のイリジウム担持物質の一部、即ち
アルミニウム、珪素、チタン、バナジウム、ガリウム、
ゲルマニウム、モリブデン、インジウム、錫、アンチモ
ン、ランタン、タングステン、ビスマス、鉄、マンガン
およびコバルトからなる群から選択される少なくとも１
種の金属の酸化物にイリジウム金属を担持したイリジウ
ム金属担持酸化物は、一酸化炭素の酸化反応；トリメチ
ルアミンなどの悪臭物質の分解反応などに対して高い触
媒活性を有する。Some of the iridium-bearing materials of the present invention, namely, aluminum, silicon, titanium, vanadium, gallium,
At least one selected from the group consisting of germanium, molybdenum, indium, tin, antimony, lanthanum, tungsten, bismuth, iron, manganese and cobalt
An iridium metal-supported oxide in which iridium metal is supported on an oxide of a certain metal has a high catalytic activity against an oxidation reaction of carbon monoxide, a decomposition reaction of a malodorous substance such as trimethylamine, and the like.
【００５３】一酸化炭素の酸化反応においては、担体と
して、チタン酸化物、酸化鉄、アルミナ、酸化スズ、酸
化マンガン、酸化コバルトなどを用いた触媒が好まし
く、TiO2(ルチル、アナターゼ、これらの混合物を含
む)、Fe2O3(特にα酸化鉄)、SnO2などを用いた触媒が特
に好ましい。In the oxidation reaction of carbon monoxide, a catalyst using titanium oxide, iron oxide, alumina, tin oxide, manganese oxide, cobalt oxide or the like as a carrier is preferable, and TiO 2 (rutile, anatase, a mixture thereof) is used. ), Fe 2 O 3 (particularly α iron oxide), SnO 2, and the like.
【００５４】悪臭物質の分解反応においては、担体とし
て、チタン酸化物、酸化鉄、アルミナ、酸化スズ、酸化
マンガン、酸化コバルトなどを用いた触媒が好ましく、
TiO2(ルチル、アナターゼ、これらの混合物を含む)、Fe
2O3(特にα酸化鉄)、SnO2などを用いた触媒が特に好ま
しい。In the decomposition reaction of the malodorous substance, a catalyst using titanium oxide, iron oxide, alumina, tin oxide, manganese oxide, cobalt oxide or the like as a carrier is preferable.
TiO 2 (including rutile, anatase, and mixtures thereof), Fe
A catalyst using 2 O 3 (particularly α iron oxide), SnO 2 or the like is particularly preferable.
【００５５】触媒におけるイリジウムの担持量は、特に
制限されないが、担体に対して通常0.01〜20wt%程度、
好ましくは0.1〜10wt%程度、特に好ましくは0.5〜6wt%
程度である。The amount of iridium supported on the catalyst is not particularly limited, but is usually about 0.01 to 20% by weight based on the carrier.
Preferably about 0.1 to 10 wt%, particularly preferably 0.5 to 6 wt%
It is about.
【００５６】一酸化炭素の酸化反応における反応温度
は、特に制限されないが、通常0〜150℃程度であり、好
ましくは0〜120℃程度、特に好ましくは0〜50℃程度で
ある。The reaction temperature in the oxidation reaction of carbon monoxide is not particularly limited, but is usually about 0 to 150 ° C., preferably about 0 to 120 ° C., and particularly preferably about 0 to 50 ° C.
【００５７】一酸化炭素の酸化反応における反応圧力
は、特に制限されないが、通常0.1〜10気圧程度であ
り、好ましくは1〜2気圧程度である。一酸化炭素と酸素
とのモル比は、特に制限されないが、通常0.5〜40程
度、好ましくは2〜20程度である。The reaction pressure in the oxidation reaction of carbon monoxide is not particularly limited, but is usually about 0.1 to 10 atm, preferably about 1 to 2 atm. The molar ratio between carbon monoxide and oxygen is not particularly limited, but is usually about 0.5 to 40, preferably about 2 to 20.
【００５８】一酸化炭素の酸化反応における触媒量は特
に制限されない。例えば、空気中に1vol%の反応ガス(一
酸化炭素)が含まれる場合の空間速度(SV：ml/h・g, gは
触媒の重量を示す)は、通常100〜40000ml/h・g程度、好
ましくは2000〜20000程度である。The amount of the catalyst in the oxidation reaction of carbon monoxide is not particularly limited. For example, the space velocity (SV: ml / hg, g indicates the weight of the catalyst) when 1 vol% of reaction gas (carbon monoxide) is contained in air is usually about 100 to 40,000 ml / hg. And preferably about 2,000 to 20,000.
【００５９】トリメチルアミンなどの悪臭物質の分解反
応における反応温度は、特に制限されないが、通常25〜
300℃程度であり、好ましくは100〜250℃程度であり、
特に好ましくは120〜180℃程度である。The reaction temperature in the decomposition reaction of malodorous substances such as trimethylamine is not particularly limited, but is usually 25 to 25.
About 300 ° C, preferably about 100 to 250 ° C,
Particularly preferably, it is about 120 to 180 ° C.
【００６０】悪臭物質の分解反応における反応圧力は、
特に制限されないが、通常0.1〜10気圧程度であり、好
ましくは1〜2気圧程度である。悪臭物質の分解反応にお
ける触媒量は特に制限されないが、空間速度(SV：ml/h
・g, gは触媒の重量を示す)として通常100〜40000ml/h
・g程度、好ましくは2000〜20000程度である。The reaction pressure in the decomposition reaction of the malodorous substance is:
Although not particularly limited, it is generally about 0.1 to 10 atm, preferably about 1 to 2 atm. The amount of the catalyst in the decomposition reaction of offensive odor substances is not particularly limited, but the space velocity (SV: ml / h
G, g indicate the weight of the catalyst) and usually 100 to 40,000 ml / h
-About g, preferably about 2,000 to 20,000.
【００６１】[0061]
【発明の効果】本発明によると、塩素含有量が100ppm以
下のイリジウム担持物質を得ることができる。より適当
な条件を設定することにより、塩素の含まれないイリジ
ウム担持物質を得ることも可能である。According to the present invention, an iridium-carrying substance having a chlorine content of 100 ppm or less can be obtained. By setting more appropriate conditions, it is possible to obtain an iridium-carrying substance containing no chlorine.
【００６２】本発明では、従来法よりも、均一に分散さ
せてイリジウムを担持させることが可能である。According to the present invention, iridium can be supported by being dispersed more uniformly than in the conventional method.
【００６３】本発明によると、今までの手法では担持が
困難であった金属酸化物等の上にも微細なイリジウムを
担持することが可能となった。According to the present invention, it has become possible to carry fine iridium even on metal oxides and the like which have been difficult to carry with the conventional methods.
【００６４】本発明により得られたイリジウム担持物質
の一部は、一酸化炭素の酸化反応、悪臭物質の分解反応
などにおいて、高い触媒活性を示す。本発明の触媒は、
従来の製造法で作成した触媒よりも、高い活性を示す。
例えば、本発明の触媒によると、一酸化炭素から二酸化
炭素への酸化反応において、反応温度0〜150℃で、10％
以上(好ましい条件下では50%以上、より好ましい条件下
では90%以上)の反応率を得ることができる。この様に、
本発明の触媒は、低温においても高い活性を示す。Some of the iridium-carrying substances obtained according to the present invention exhibit high catalytic activity in the oxidation reaction of carbon monoxide, the decomposition reaction of malodorous substances, and the like. The catalyst of the present invention
Shows higher activity than catalysts prepared by conventional manufacturing methods.
For example, according to the catalyst of the present invention, in the oxidation reaction of carbon monoxide to carbon dioxide, at a reaction temperature of 0 to 150 ° C., 10%
A reaction rate of above (50% or more under preferable conditions, 90% or more under more preferable conditions) can be obtained. Like this
The catalyst of the present invention shows high activity even at low temperatures.
【００６５】[0065]
【実施例】以下、実施例を示して、本発明を更に詳細に
説明する。The present invention will be described in more detail with reference to the following examples.
【００６６】実施例１ IrCl4(79mg)を水500mlに溶解し、液温を343Kに保った。
この溶液に0.1 mol/lのNaOH水溶液8mlを１時間かけて滴
下して、pHが８になるように調整した。その後、pHが7
〜11の範囲を維持するように留意しながら酸化チタン(D
egussa：Ｐ−２５)粉末2.0gをイリジウム水溶液に導入
して、液を１時間撹拌し続けて、酸化チタン表面にイリ
ジウム前駆体(水酸化物)を析出させた。得られたイリジ
ウム水酸化物担持酸化チタンを水中で10分間撹拌し、濾
過後、ろ液のpHを測定した。この操作をろ液のpHが、前
回の測定値と同じになるまで繰り返した。水洗後、乾燥
し、さらに空気中400℃で４時間焼成することによりイ
リジウム担持物質を得た。さらに、水素を含むガス雰囲
気下(20％水素、80％アルゴン雰囲気)において、245℃
１時間の条件でイリジウム金属担持物質を活性化した。Example 1 IrCl 4 (79 mg) was dissolved in 500 ml of water, and the solution temperature was maintained at 343K.
To this solution, 8 ml of a 0.1 mol / l NaOH aqueous solution was added dropwise over 1 hour to adjust the pH to 8. After that, pH 7
Titanium oxide (D
egussa: P-25) 2.0 g of powder was introduced into an iridium aqueous solution, and the liquid was continuously stirred for 1 hour to precipitate an iridium precursor (hydroxide) on the surface of titanium oxide. The obtained iridium hydroxide-supported titanium oxide was stirred in water for 10 minutes, filtered, and the pH of the filtrate was measured. This operation was repeated until the pH of the filtrate became the same as the previously measured value. After washing with water, drying and calcining at 400 ° C. for 4 hours in the air, an iridium-carrying substance was obtained. Further, under a gas atmosphere containing hydrogen (20% hydrogen, 80% argon atmosphere), 245 ° C
The iridium metal-carrying material was activated for one hour.
【００６７】得られたイリジウム金属担持物質を透過型
電子頭微鏡で観察した。結果を図２に示す。図２から明
らかなように、担持されたイリジウムは、微粒子が凝集
することによって、均一な薄膜を形成しており、その膜
厚は3nmであった。得られたイリジウム担持物質の塩素
含有量は、54ppmであった。The obtained iridium metal-carrying substance was observed with a transmission electron microscope. The results are shown in FIG. As is clear from FIG. 2, the supported iridium formed a uniform thin film by agglomeration of fine particles, and its thickness was 3 nm. The chlorine content of the obtained iridium-carrying substance was 54 ppm.
【００６８】上記物質を70〜120メッシュにふるい分け
したものを100mg用い、一酸化炭素を１容量％含む空気
混合ガスを33ml/minで流通させて、各測定温度において
３０分間の一酸化炭素に対する酸化活性を調べた。100 mg of the above substance sieved to 70 to 120 mesh was used, and an air mixed gas containing 1% by volume of carbon monoxide was passed at 33 ml / min to oxidize carbon monoxide for 30 minutes at each measurement temperature. The activity was examined.
【００６９】その結果、25℃で酸化能率(反応率)100％
を示し、このイリジウム担持酸化チタンは、室温付近で
も高い一酸化炭素酸化活性を示すことが明らかとなっ
た。As a result, at 25 ° C., the oxidation efficiency (reaction rate) was 100%.
This indicates that this iridium-supported titanium oxide exhibits high carbon monoxide oxidation activity even at around room temperature.
【００７０】実施例２ 金属酸化物担体として酸化鉄(α−Fe2O3)を用いる以外
は実施例１と同様の方法でイリジウム金属担持酸化鉄を
調製した。Example 2 An iridium metal-supported iron oxide was prepared in the same manner as in Example 1 except that iron oxide (α-Fe 2 O 3 ) was used as a metal oxide carrier.
【００７１】得られたイリジウム担持物質の塩素含有量
は、68ppmであった。The iridium-carrying substance obtained had a chlorine content of 68 ppm.
【００７２】実施例３ 金属酸化物担体としてアルミナを用いる以外は実施例１
と同様の方法でイリジウム金属担持アルミナを調製し
た。Example 3 Example 1 except that alumina was used as the metal oxide carrier.
Iridium metal-supported alumina was prepared in the same manner as described above.
【００７３】得られたイリジウム担持物質の塩素含有量
は、48ppmであった。The chlorine content of the obtained iridium-carrying substance was 48 ppm.
【００７４】実施例４ 金属酸化物担体としてSnO2を用いる以外は実施例１と同
様の方法でイリジウム金属担持酸化スズを調製した。Example 4 An iridium metal-supported tin oxide was prepared in the same manner as in Example 1 except that SnO 2 was used as a metal oxide carrier.
【００７５】得られたイリジウム担持物質の塩素含有量
は、32ppmであった。The iridium-carrying substance obtained had a chlorine content of 32 ppm.
【００７６】実施例５ 金属酸化物担体としてMn2O3を用いる以外は実施例１と
同様の方法でイリジウム金属担持Mn2O3を調製した。Example 5 An iridium metal-supported Mn 2 O 3 was prepared in the same manner as in Example 1 except that Mn 2 O 3 was used as a metal oxide carrier.
【００７７】得られたイリジウム担持物質の塩素含有量
は、42ppmであった。The iridium-carrying substance obtained had a chlorine content of 42 ppm.
【００７８】実施例６ 金属酸化物担体としてCo3O4を用いる以外は実施例１と
同様の方法でイリジウム金属担持Co3O4を調製した。Example 6 An iridium metal-supported Co 3 O 4 was prepared in the same manner as in Example 1 except that Co 3 O 4 was used as a metal oxide carrier.
【００７９】得られたイリジウム担持物質の塩素含有量
は、42ppmであった。The chlorine content of the obtained iridium-carrying substance was 42 ppm.
【００８０】実施例７ IrCl4(79mg)を水500mlに溶解し、液温を３４３Ｋに保っ
た。この溶液に0.1mol/lのＮａ０Ｈ水溶液8mlを１時間
かけて滴下して、ｐＨが８となるように調整した。その
後、酸化チタン(Degussa：Ｐ−２５)粉未2.0ｇをイリジ
ウム水溶液に導入させながら、クエン酸ナトリウムを導
入しながら、液の攪拌を１時間続け酸化チタン表面にイ
リジウム前駆体(水酸化イリジウム)を析出させた。得ら
れた酸化チタンを水洗した後乾燥し、さらに空気中400
℃で４時間焼成し、さらに水素を含むガス雰囲気下(２
０％水素、アルゴン雰囲気)において、245℃でｌ時間加
熱することにより、イリジウム金属担持酸化チタンを得
た。Example 7 IrCl 4 (79 mg) was dissolved in 500 ml of water, and the solution temperature was maintained at 343K. To this solution, 8 ml of a 0.1 mol / l Na0H aqueous solution was added dropwise over 1 hour to adjust the pH to 8. Then, while introducing 2.0 g of titanium oxide (Degussa: P-25) powder into the iridium aqueous solution and while introducing sodium citrate, stirring of the liquid was continued for 1 hour, and an iridium precursor (iridium hydroxide) was formed on the titanium oxide surface. Was precipitated. The obtained titanium oxide is washed with water, dried, and further 400 in air.
At 4 ° C. for 4 hours and further in a gas atmosphere containing hydrogen (2
By heating at 245 ° C. for 1 hour in an atmosphere of 0% hydrogen and argon, iridium metal-supported titanium oxide was obtained.
【００８１】得られたイリジウム担持物質の塩素含有量
は、71ppmであった。The chlorine content of the obtained iridium-carrying substance was 71 ppm.
【００８２】比較例１ 以下に示すように、従来法によってIr担持物質を調製し
た。IrCl4(79mg)を水300mlに溶解し、液温を65℃に保っ
た。この溶液に酸化チタン(Degussa：Ｐ−２５)粉末2.0
gをイリジウム水溶液に導入して、30分間撹拌し続け、
その後エバポレーターを用いて70℃に温度を保持しなが
ら水を除去し、蒸発乾固させた。担体を濾取し、空気中
400℃で４時間焼成することによりイリジウム担持物質
を得た。さらに、水素を含むガス雰囲気下(20％水素、8
0％アルゴン雰囲気)において、245℃１時間の条件でイ
リジウム金属担持物質を活性化した。Comparative Example 1 As shown below, an Ir-carrying substance was prepared by a conventional method. IrCl 4 (79 mg) was dissolved in 300 ml of water, and the solution temperature was kept at 65 ° C. Titanium oxide (Degussa: P-25) powder 2.0 was added to this solution.
g into the iridium aqueous solution and continue stirring for 30 minutes,
Thereafter, water was removed while maintaining the temperature at 70 ° C. using an evaporator, and the mixture was evaporated to dryness. Filter the carrier, and in the air
By firing at 400 ° C. for 4 hours, an iridium-carrying substance was obtained. Furthermore, under a gas atmosphere containing hydrogen (20% hydrogen, 8%
In a 0% argon atmosphere), the iridium metal-carrying substance was activated at 245 ° C. for 1 hour.
【００８３】得られたイリジウム担持物質の塩素含有量
は、8400ppmであった。The obtained iridium-carrying substance had a chlorine content of 8,400 ppm.
【００８４】比較例２ 担体として酸化鉄(α-Fe2O3)を用いる以外は比較例１と
同様の方法でイリジウム金属担持酸化鉄を調製した。Comparative Example 2 An iridium metal-carrying iron oxide was prepared in the same manner as in Comparative Example 1 except that iron oxide (α-Fe 2 O 3 ) was used as a carrier.
【００８５】得られたイリジウム担持物質の塩素含有量
は、7540ppmであった。The iridium-carrying substance obtained had a chlorine content of 7540 ppm.
【００８６】比較例３ 担体としてアルミナを用いる以外は比較例１と同様の方
法でイリジウム金属担持アルミナを調製した。Comparative Example 3 An iridium metal-carrying alumina was prepared in the same manner as in Comparative Example 1 except that alumina was used as a carrier.
【００８７】得られたイリジウム担持物質の塩素含有量
は、7930ppmであった。The obtained iridium-carrying substance had a chlorine content of 7,930 ppm.
【００８８】実施例８ 実施例２〜７および比較例２において作成したイリジウ
ム担持金属酸化物の一酸化炭素酸化活性を測定した。そ
れぞれの触媒に、一酸化炭素を１容量含む空気混合ガス
を33ml/分で流通させて、一酸化炭素の酸化活性を調べ
た。結果を図１に示す。Example 8 The activity of oxidizing carbon monoxide on the iridium-supported metal oxide prepared in Examples 2 to 7 and Comparative Example 2 was measured. An air mixed gas containing one volume of carbon monoxide was passed through each catalyst at 33 ml / min, and the oxidation activity of carbon monoxide was examined. The results are shown in FIG.
【００８９】比較例２において調製したイリジウムを担
持した酸化鉄を触媒として用いた場合には、550Kにおい
て、一酸化炭素を100％二酸化炭素に酸化できた。When iridium-supported iron oxide prepared in Comparative Example 2 was used as a catalyst, carbon monoxide could be oxidized to 100% carbon dioxide at 550K.
【００９０】実施例３において調製したイリジウムを担
持したアルミナを触媒として用いた場合には、420Kにお
いて、一酸化炭素を100％二酸化炭素に酸化できた。When the iridium-supported alumina prepared in Example 3 was used as a catalyst, carbon monoxide could be oxidized to 100% carbon dioxide at 420K.
【００９１】実施例７において調製したイリジウムを担
持した酸化チタンを触媒として用いた場合には、25℃に
おいて、一酸化炭素を100％二酸化炭素に酸化できた。When iridium-supported titanium oxide prepared in Example 7 was used as a catalyst, carbon monoxide could be oxidized to 100% carbon dioxide at 25 ° C.
【００９２】触媒を使用しない場合には、図１に示す温
度範囲全域において、一酸化炭素の酸化は生じなかっ
た。When no catalyst was used, no oxidation of carbon monoxide occurred over the entire temperature range shown in FIG.
【００９３】実施例１〜７の一酸化炭素の酸化反応に対
する触媒活性の評価により、従来法により調製した触媒
と同等もしくはそれ以上の活性を示すことが分かった。Evaluation of the catalytic activity for the oxidation reaction of carbon monoxide in Examples 1 to 7 showed that the catalytic activity was equal to or higher than that of the catalyst prepared by the conventional method.
【００９４】実施例９ 実施例１または比較例１において調製したIr担持物質を
用いて一酸化炭素酸化反応における触媒活性の経時変化
を測定した。反応温度を25℃とした以外は、実施例９と
同様の条件とした。Example 9 The change over time in the catalytic activity in the carbon monoxide oxidation reaction was measured using the Ir-supported substance prepared in Example 1 or Comparative Example 1. The conditions were the same as in Example 9 except that the reaction temperature was 25 ° C.
【００９５】結果を図３に示す。図３から明らかなよう
に、本発明のIr担持物質は、従来法により調製したIr担
持物質に比して、優れた耐久性を示した。FIG. 3 shows the results. As is clear from FIG. 3, the Ir-supporting substance of the present invention exhibited excellent durability as compared with the Ir-supporting substance prepared by the conventional method.
【００９６】実施例１０ 実施例１〜３、７または比較例１において調製したIr担
持物質(70〜120メッシュにふるい分けしたもの100mg)を
用いて、トリメチルアミン分解反応における触媒活性の
経時変化を測定した。トリメチルアミンを100ppm含む空
気混合ガスをSV=10000 ml/h・g(13.5 ml/min)で流通さ
せて、各測定温度において３０分間のトリメチルアミン
分解反応の触媒活性を調べた。トリメチルアミンが分解
されて、一酸化炭素、二酸化炭素などが生成した。Example 10 Using the Ir-supporting substance (100 mg sieved to 70 to 120 mesh) prepared in Examples 1 to 3 and 7 or Comparative Example 1, the change over time of the catalytic activity in the trimethylamine decomposition reaction was measured. . An air mixed gas containing 100 ppm of trimethylamine was passed at SV = 10000 ml / h · g (13.5 ml / min), and the catalytic activity of the trimethylamine decomposition reaction for 30 minutes was measured at each measurement temperature. Trimethylamine was decomposed to produce carbon monoxide, carbon dioxide and the like.
【００９７】結果を図４に示す。図４から明らかなよう
に、本発明のIr担持物質は、従来法により調製したIr担
持物質に比して、優れた触媒活性を示した。FIG. 4 shows the results. As is clear from FIG. 4, the Ir-supporting substance of the present invention exhibited excellent catalytic activity as compared with the Ir-supporting substance prepared by the conventional method.
【図１】実施例１〜７および比較例２において製造した
本発明によるイリジウム金属担持物質の一酸化炭素酸化
活性を示すグラフである。FIG. 1 is a graph showing the carbon monoxide oxidizing activity of the iridium metal-carrying substance according to the present invention produced in Examples 1 to 7 and Comparative Example 2.
【図２】本発明によるイリジウム金属担持物質の透過型
電子頭微鏡を用いて得られた観察像である。担体として
用いた酸化チタンは、ルチル構造とアナターゼ構造の混
合物であり、観察像には、ルチル構造の酸化チタン上に
イリジウムが担持されている様子が映し出されている。FIG. 2 is an observation image obtained by using a transmission electron microscope for an iridium metal-carrying substance according to the present invention. The titanium oxide used as the carrier is a mixture of a rutile structure and an anatase structure, and the observation image shows a state in which iridium is supported on the rutile structure titanium oxide.
【図３】実施例９の結果を示す図である。実施例１と比
較例１において調製したイリジウム担持酸化チタンの25
℃における一酸化炭素酸化活性の経時変化を示す。FIG. 3 shows the results of Example 9. 25 of the iridium-supported titanium oxide prepared in Example 1 and Comparative Example 1
1 shows the change over time in carbon monoxide oxidation activity at ° C.
【図４】実施例１０の結果を示す図である。実施例１〜
３、７および比較例１において調製したイリジウム担持
物質のトリメチルアミン分解活性の温度依存性を示す。FIG. 4 is a diagram showing the results of Example 10. Example 1
3 shows the temperature dependence of the trimethylamine decomposition activity of the iridium-carrying substances prepared in 3, 7 and Comparative Example 1.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｊ 23/89 Ｂ０１Ｄ 53/36 Ｈ 35/06 １０４Ｚ 37/02 １０１ Ｂ０１Ｊ 23/64 １０４Ａ Ｆターム(参考） 4D048 AA13 AA22 AB01 AB03 BA03X BA07X BA15X BA16Y BA17Y BA18Y BA20Y BA21X BA22Y BA23Y BA24Y BA25Y BA26Y BA27Y BA28X BA29Y BA30Y BA31Y BA32Y BA33X BA34Y BA35Y BA36X BA37X BA38Y BA41X BB01 4G069 AA03 AA08 BA01A BA01B BA02A BA04A BA05A BA05B BA06A BA08A BA21C BA27C BB01C BB02A BB02B BB04A BB04B BB05C BB07C BC02C BC03C BC04C BC05C BC10C BC12A BC13A BC17A BC18A BC19A BC22A BC22B BC23A BC26A BC31A BC32A BC35A BC36A BC40A BC42A BC44A BC52A BC54A BC55A BC58A BC59A BC60A BC62A BC62B BC64A BC66A BC66B BC67A BC67B BC68A BC70A BC71A BC72A BC73A BC74A BC74B BC74C BC75A BD01C BD06C BD12C BE08C BE44C BE46C CA07 CA10 CA14 CA17 EA02Y EA03X EB18Y EC03Y ED05 FA02 FB14 FB18 FB30 FB36 FC02 FC04 FC07 FC09 FC10──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01J 23/89 B01D 53/36 H 35/06 104Z 37/02 101 B01J 23/64 104A F-term (Reference) 4D048 AA13 AA22 AB01 AB03 BA03X BA07X BA15X BA16Y BA17Y BA18Y BA20Y BA21X BA22Y BA23Y BA24Y BA25Y BA26Y BA27Y BA28X BA29Y BA30Y BA31Y BA32Y BA33X BA34Y BA35Y BA36X BA37X BA38Y BA41X BB01 4G069 AA03 AA08 BA01A BA01B BA02A BA04A BA05A BA05B BA06A BA08A BA21C BA27C BB01C BB02A BB02B BB04A BB04B BB05C BB07C BC02C BC03C BC04C BC05C BC10C BC12A BC13A BC17A BC18A BC19A BC22A BC22B BC23A BC26A BC31A BC32A BC35A BC36A BC40A BC42A BC44A BC52A BC54A BC55A BC58A BC59A BC60A BC62A BC62B BC64A BC66A BC66B BC67A BC67B BC68A BC70A BC71A BC72A BC73A BC74A BC74B BC74C BC75A BD01C BD06C BD12C BE08C BE44C BE46C CA07 CA10 CA1 4 CA17 EA02Y EA03X EB18Y EC03Y ED05 FA02 FB14 FB18 FB30 FB36 FC02 FC04 FC07 FC09 FC10
Claims (13)
持物質であって、塩素含有量が、100ppm以下であるイリ
ジウム担持物質。An iridium-carrying substance having iridium supported on a carrier, wherein the iridium-carrying substance has a chlorine content of 100 ppm or less.
徐々に滴下することによってpHを7〜11に調整し、この
溶液に前記pH範囲を維持しつつ担体を含浸させた後、ま
たは(b)イリジウム化合物水溶液に予め担体を含浸さ
せ、これにpH調整液を徐々に滴下してpHを7〜11に調整
した後、得られた物質を水洗し、200〜500℃で焼成する
ことにより得られるイリジウム担持物質。(A) adjusting the pH to 7 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or ( b) impregnating the carrier in advance with an aqueous iridium compound solution, adjusting the pH to 7 to 11 by gradually adding a pH adjusting solution thereto, washing the obtained substance with water, and baking at 200 to 500 ° C. The resulting iridium-carrying substance.
徐々に滴下することによってpHを6〜11に調整し、この
溶液に前記pH範囲を維持しつつ担体を含浸させた後、ま
たは(b)イリジウム化合物水溶液に予め担体を含浸さ
せ、これにpH調整液を徐々に滴下してpHを6〜11に調整
した後、凝集抑制剤溶液を滴下し、得られた物質を水洗
し、200〜500℃で焼成することにより得られるイリジウ
ム担持物質。(A) adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or ( b) impregnating the carrier in advance with an iridium compound aqueous solution, gradually adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution, then dropping an aggregation inhibitor solution, and washing the obtained substance with water; An iridium-carrying substance obtained by firing at ~ 500 ° C.
し、得られた溶液に担体を含浸させ、有機溶媒を除去
後、得られた物質を200〜500℃で焼成することにより得
られるイリジウム担持物質。4. A compound obtained by dissolving a Cl-free Ir compound in an organic solvent, impregnating the resulting solution with a carrier, removing the organic solvent, and calcining the obtained substance at 200 to 500 ° C. Iridium carrier.
ム、珪素、チタン、バナジウム、クロム、マンガン、
鉄、コバルト、ニッケル、銅、亜鉛、ガリウム、ゲルマ
ニウム、ストロンチウム、イットリウム、ジルコニウ
ム、ニオブ、モリブデン、テクネチウム、ルテニウム、
ロジウム、パラジウム、銀、カドミウム、インジウム、
錫、アンチモン、バリウム、ランタン、ハフニウム、タ
リウム、タングステン、レニウム、オスミウム、イリジ
ウムおよび白金からなる群から選択される少なくとも１
種の金属の酸化物、或いは(２)活性炭または活性炭素繊
維である請求項１〜４のいずれかに記載のイリジウム担
持物質。5. A carrier comprising: (1) magnesium, aluminum, silicon, titanium, vanadium, chromium, manganese,
Iron, cobalt, nickel, copper, zinc, gallium, germanium, strontium, yttrium, zirconium, niobium, molybdenum, technetium, ruthenium,
Rhodium, palladium, silver, cadmium, indium,
At least one selected from the group consisting of tin, antimony, barium, lanthanum, hafnium, thallium, tungsten, rhenium, osmium, iridium and platinum
The iridium-carrying substance according to any one of claims 1 to 4, which is an oxide of a kind of metal or (2) activated carbon or activated carbon fiber.
徐々に滴下することによってpHを7〜11に調整し、この
溶液に前記pH範囲を維持しつつ担体を含浸させた後、ま
たは(b)イリジウム化合物水溶液に予め担体を含浸さ
せ、これにpH調整液を徐々に滴下してpHを7〜11に調整
した後、得られた物質を水洗し、200〜500℃で焼成する
イリジウム担持方法。(A) adjusting the pH to 7 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or ( b) impregnating the carrier in advance with an aqueous iridium compound solution, gradually adjusting the pH to 7 to 11 by dropping a pH adjusting solution gradually, washing the obtained substance with water, and baking at 200 to 500 ° C. Method.
徐々に滴下することによってpHを6〜11に調整し、この
溶液に前記pH範囲を維持しつつ担体を含浸させた後、ま
たは(b)イリジウム化合物水溶液に予め担体を含浸さ
せ、これにpH調整液を徐々に滴下してpHを6〜11に調整
した後、凝集抑制剤溶液を滴下し、得られた物質を水洗
し、200〜500℃で焼成するイリジウム担持方法。(A) adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution into the iridium compound aqueous solution, and impregnating the carrier with the solution while maintaining the pH range, or b) impregnating the carrier in advance with an iridium compound aqueous solution, gradually adjusting the pH to 6 to 11 by gradually dropping a pH adjusting solution, then dropping an aggregation inhibitor solution, and washing the obtained substance with water; An iridium-supporting method of firing at a temperature of up to 500 ° C.
(NH4)2IrCl6からなる群から選択される少なくとも一種
の水溶性化合物である請求項６または７に記載のイリジ
ウム担持方法。8. The iridium compound according to claim 1, wherein the iridium compound is IrCl 4 , IrCl 3 and
The iridium-supporting method according to claim 6 or 7, wherein the iridium-supporting method is at least one water-soluble compound selected from the group consisting of (NH 4 ) 2 IrCl 6 .
からなる群から選択される少なくとも一種の化合物の水
溶液またはアンモニア水である請求項６〜８のいずれか
に記載のイリジウム担持方法。9. A pH adjusting solution comprising NaOH, LiOH, RbOH and KOH
The iridium-supporting method according to any one of claims 6 to 8, wherein the method is an aqueous solution of at least one compound selected from the group consisting of or aqueous ammonia.
または二クエン酸三マグネシウムの溶液である請求項７
〜９のいずれかに記載の方法。10. The coagulation inhibitor solution is a solution of sodium citrate or trimagnesium dicitrate.
10. The method according to any one of claims 9 to 9.
し、得られた溶液に担体を含浸させ、有機溶媒を除去
後、得られた物質を200〜500℃で焼成するイリジウム担
持方法。11. A method for supporting iridium, comprising dissolving an Ir compound containing no Cl in an organic solvent, impregnating the obtained solution with a carrier, removing the organic solvent, and calcining the obtained substance at 200 to 500 ° C.
であって、アルミニウム、珪素、チタン、バナジウム、
ガリウム、ゲルマニウム、モリブデン、インジウム、
錫、アンチモン、ランタン、タングステン、ビスマス、
鉄、マンガンおよびコバルトからなる群から選択される
少なくとも１種の金属の酸化物にイリジウム金属を担持
したイリジウム金属担持酸化物からなり、0〜150℃で一
酸化炭素を二酸化炭素へ酸化可能な触媒。12. A catalyst for oxidizing carbon monoxide to carbon dioxide, comprising aluminum, silicon, titanium, vanadium,
Gallium, germanium, molybdenum, indium,
Tin, antimony, lanthanum, tungsten, bismuth,
A catalyst comprising an iridium metal-supported oxide obtained by supporting iridium metal on an oxide of at least one metal selected from the group consisting of iron, manganese, and cobalt, and capable of oxidizing carbon monoxide to carbon dioxide at 0 to 150 ° C. .
ミニウム、珪素、チタン、バナジウム、ガリウム、ゲル
マニウム、モリブデン、インジウム、錫、アンチモン、
ランタン、タングステン、ビスマス、鉄、マンガンおよ
びコバルトからなる群から選択される少なくとも１種の
金属の酸化物にイリジウム金属を担持したイリジウム金
属担持酸化物からなり、25〜300℃で悪臭物質を分解可
能な触媒。13. A catalyst for decomposing malodorous substances, comprising aluminum, silicon, titanium, vanadium, gallium, germanium, molybdenum, indium, tin, antimony,
Consists of an iridium metal-supported oxide that supports iridium metal on an oxide of at least one metal selected from the group consisting of lanthanum, tungsten, bismuth, iron, manganese, and cobalt, and can decompose odorous substances at 25 to 300 ° C Catalyst.
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| JP2012000595A (en) * | 2010-06-18 | 2012-01-05 | Ict:Kk | Catalyst for cleaning exhaust gas, manufacturing method thereof and exhaust gas cleaning method using the same |
| CN113871640A (en) * | 2021-09-24 | 2021-12-31 | 中汽创智科技有限公司 | Anti-reversal catalyst for fuel cell and preparation method and application thereof |
| WO2022264960A1 (en) * | 2021-06-15 | 2022-12-22 | 国立研究開発法人理化学研究所 | Iridium-manganese oxide composite material, iridium-manganese oxide composite electrode material, and methods for producing same |
| CN116060135A (en) * | 2023-02-20 | 2023-05-05 | 中国科学院生态环境研究中心 | Composite nano material, preparation method and catalytic degradation application |
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