Are noble metal-based water-gas shift catalysts practical for automotive fuel processing?

被引：158
作者：
Zalc, JM
Sokolovskii, V
Löffler, DG
机构：
[1] IdaTech, Bend, OR 97708 USA
[2] Catalyt Energy Syst Inc, Mt View, CA 94043 USA
来源：
JOURNAL OF CATALYSIS | 2002年 / 206卷 / 01期
关键词：
water-gas shift catalysts; carbon monoxide conversion; fuel processing; hydrogen production; PEM fuel cells;
D O I：
10.1006/jcat.2001.3465
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：
Several Pt-based water-gas shift catalysts were prepared and tested for activity and stability. Under feed conditions typical of a reformer outlet, low activity and rapid first-order deactivation were observed. Virtually identical deactivation rates were found for all Pt/ceria water-gas shift catalysts tested. A strong dependence of the deactivation rate on the presence of hydrogen in the feed suggests that a large hydrogen fraction may lead to the irreversible overreduction of the ceria; this problem is likely to plague all such noble metal-based systems. (C) 2002 Elsevier Science (USA).
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页码：169 / 171
页数：3
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