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).

引用

页码：169 / 171

页数：3