Preferential oxidation of CO in H2 over CuO-CeO2 catalysts

被引：198
|
作者：
Liu, Y [1 ]
Fu, Q
Flytzani-Stephanopoulos, M
机构：
[1] Tianjin Univ, Coll Chem Engn, Dept Catalysis Sci & Technol, Tianjin 300072, Peoples R China
[2] Tufts Univ, Dept Chem & Biol Engn, Medford, MA 02155 USA
来源：
CATALYSIS TODAY | 2004年 / 93-5卷
关键词：
preferential oxidation; selective oxidation of carbon monoxide; fuel cells; cerium oxide; copper; redox; hydrogen production;
D O I：
10.1016/j.cattod.2004.06.049
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
CuO-CeO2 catalysts prepared by the urea gelation/co-precipitation (UGC) method were studied for the preferential oxidation of CO in H-2. The activity and selectivity of these catalysts are among the best reported to date for application to reformate-type gas mixtures. For a material calcined at 650 degreesC, similar to5 at.% Cu content is sufficient for maximum activity. Cu-O-Ce phases, comprising copper oxide clusters strongly associated with ceria, are proposed as the active sites for the reaction. No inhibition by CO2 is observed at temperatures above 140 degreesC, but the combined effect of H2O and CO2 is stronger, requiring operation at 165 degreesC for 99% CO conversion and 65% selectivity. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：241 / 246
页数：6
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