Catalytic performance of Pt supported on various metal oxides in the oxidation of carbon black

被引：60

作者：

Oi-Uchisawa, J ^{[1
]}

Obuchi, A ^{[1
]}

Enomoto, R ^{[1
]}

Liu, ST ^{[1
]}

Nanba, T ^{[1
]}

Kushiyama, S ^{[1
]}

机构：

[1] Natl Inst Resources & Environm, Atmospher Environm Protect Dept, Tsukuba, Ibaraki 3058569, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2000年 / 26卷 / 01期

关键词：

platinum; carbon black; oxidation; catalyst; support; NO2; SO2; SO3; H2SO4;

D O I：

10.1016/S0926-3373(99)00142-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：17 / 24

页数：8

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