Effect of support on the preferential oxidation of CO over cobalt catalysts

被引：86
作者：
Zhao, Zhongkui [1 ]
Yung, Matthew M. [1 ]
Ozkan, Umit S. [1 ]
机构：
[1] Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA
来源：
CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 06期
关键词：
cobalt; ZrO2; CeO2; Al2O3; TiO2; support; PROX; CO oxidation; SiO2;
D O I：
10.1016/j.catcom.2007.12.013
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：
Cobalt catalysts supported on metal oxides (ZrO2, CeO2, SiO2, Al2O3, and TiO2) were prepared to investigate the effects of the support for the preferential oxidation (PROX) of CO in excess H-2. Transient studies (TP-rxn) as well as steady-state activity measurements were performed to examine and quantify activity over a broad temperature window. Metal dispersion and CO uptake capacity measurements were obtained for the materials, which showed that Co/ZrO2 had higher cobalt dispersion and more sites for CO adsorption than the other materials, and also had the highest rate of CO conversion during the PROX reaction. (C) 2008 Published by Elsevier B.V.
引用
收藏
页码：1465 / 1471
页数：7
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