Cerium-terbium mixed oxides as alternative components for three-way catalysts:: a comparative study of Pt/CeTbOx and Pt/CeO2 model systems

被引：55

作者：

Bernal, S ^{[1
]}

Blanco, G ^{[1
]}

Cauqui, MA ^{[1
]}

Corchado, MP ^{[1
]}

Larese, C ^{[1
]}

Pintado, JM ^{[1
]}

Rodríguez-Izquierdo, JM ^{[1
]}

机构：

[1] Univ Cadiz, Dept Ciencias Los Mat Ingn Metalurg & Quim Inorga, E-11510 Puerto Real, Spain

来源：

CATALYSIS TODAY | 1999年 / 53卷 / 04期

关键词：

ceria-terbia; ceria; platinum; oxygen buffering; oxygen storage; CO oxidation; CH4; oxidation;

D O I：

10.1016/S0920-5861(99)00148-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

By using a combination of oxygen buffering capacity (OBC) and oxygen storage capacity (OSC) measurements, the redox behaviour of a Pt/CeToO(x) catalyst is compared to that of a classic model TWC system: Pt/CeO2. The results reported here show that the redox efficiency of the Pt/CeTbOx catalyst is much better, especially at low temperature operation conditions such as those occurring during the cold start of engines. The catalyst containing terbium also shows lower 'light-off temperatures for both methane and carbon monoxide oxidation. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：607 / 612

页数：6

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