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

Citation
J. Oi-uchisawa et al., Catalytic performance of Pt supported on various metal oxides in the oxidation of carbon black, APP CATAL B, 26(1), 2000, pp. 17-24
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics","Environmental Engineering & Energy
Journal title
APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN journal
0926-3373 → ACNP
Volume
26
Issue
1
Year of publication
2000
Pages
17 - 24
Database
ISI
SICI code
0926-3373(20000410)26:1<17:CPOPSO>2.0.ZU;2-F
Abstract
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-s upported metal oxides (Ta2O5, Nb2O5, WO3, SnO2, SiO2, TiO2, Al2O3 and ZrO2) , Pt/Ta2O5 showed the highest activity towards the oxidation of carbon blac k in a model diesel exhaust, containing O-2, H2O, NO and SO2 in N-2. Pt cat alysts supported on other non-basic metal oxides such as Nb2O5, WO3, SnO2 a nd SiO2 showed similar high activities. The high activity for these catalys ts 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 wit h a catalysis of SO3. (C) 2000 Elsevier Science B.V. All rights reserved.