The effect of support materials for Pt catalysts on the oxidation of carbon black, a model diesel-exhaust soot was examined. Among Eight kinds of Pt-supported metal oxides (Ta2O5, Nb2O5, WO3, SnO2, SiO2, TiO2, Al2O3 and ZrO2), Pt/Ta2O5 showed the highest activity towards the oxidation of carbon black in a model diesel exhaust, containing O-2, H2O, NO and SO2 in N-2. Pt catalysts supported on other non-basic metal oxides such as Nb2O5, WO3, SnO2 and SiO2 showed similar high activities. The high activity for these catalysts was attributed to their non-basicity and negligible affinity toward SO3 (or H2SO4), which results in less poisoning of the supported Pt and also in a smooth supply of SO3 to the carbon surface, which is oxidized by NO2 with a catalysis of SO3. (C) 2000 Elsevier Science B.V. All rights reserved.
机构:
Chiang Mai Univ, Fac Sci, Dept Chem, Chiang Mai 50200, Thailand
Chiang Mai Univ, Fac Sci, Mat Sci Res Ctr, Chiang Mai 50200, Thailand
Chiang Mai Univ, Fac Sci, Dept Chem, Lab Vantage Electromat LOVEs, Chiang Mai 50200, ThailandChiang Mai Univ, Fac Sci, Dept Chem, Chiang Mai 50200, Thailand
机构:
Univ Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, FranceUniv Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, France
Da Costa, Patrick
Marques, Rui
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Univ Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, FranceUniv Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, France
Marques, Rui
Da Costa, Stephanie
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Gaz France, Direct Rech, F-93211 La Plaine St Denis, FranceUniv Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, France
机构:
Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Ye, Jilei
Liu, Jianguo
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Nanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Liu, Jianguo
Zhou, Yi
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Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Zhou, Yi
Zou, Zhigang
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Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Zou, Zhigang
Gu, Jun
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Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
Gu, Jun
Yu, Tao
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Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Dept Mat Sci & Engn, ERERC, Nanjing 210093, Peoples R China
机构:
Univ Tras Os Montes Alto Douro, CQVR Ctr Quim Vila Real, Dept Quim, P-50001911 Vila Real, PortugalUniv Porto, Fac Engn, Dept Engn Quim, Lab Catalise & Mat,Lab Associado LSRE LCM, P-4200465 Oporto, Portugal