Co3O4/CeO2 andCo3O4/CeO2-ZrO2 composite catalysts for methane combustion:: Correlation between morphology reduction properties and catalytic activity

被引：150
|
作者：
Liotta, LF
Di Carlo, G
Pantaleo, G
Deganello, G
机构：
[1] CNR, ISMN, I-90146 Palermo, Italy
[2] Univ Palermo, Dipartimento Chim Inorgan & Analit Stanislao Cann, I-90128 Palermo, Italy
来源：
CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 05期
关键词：
Co3O4-ceria/ceria-zirconia composites; methane combustion; morphological and reduction properties;
D O I：
10.1016/j.catcom.2005.02.006
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：
Co3O4/CeO2 and Co3O4/CeO2-ZrO2 composite catalysts have been prepared by two different techniques, co-precipitation by citrate method and impregnation with cobalt nitrate of pre-formed ceria and ceria-zirconia oxides. The materials, as prepared and after ageing at 750 ° C 7 h, were tested for methane combustion and the catalytic performances were compared with those of a commercial Co3O4, used as reference. A significant improvement of the activity was observed in the composite oxide Co3O4(30 wt%)/ CeO2(70 wt%), prepared by citrate method, which exhibits the lowest light-off temperature of methane (T-50 = 400 ° C and does not suffer deactivation after calcination at 750 ° C 7 h. © 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：329 / 336
页数：8
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