Promoting effect of potassium in selective oxidation of CO in hydrogen-rich stream on Rh catalysts

被引：55

作者：

Tanaka, H ^{[1
]}

Ito, SI ^{[1
]}

Kameoka, S ^{[1
]}

Tomishige, K ^{[1
]}

Kunimori, K ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

来源：

CATALYSIS COMMUNICATIONS | 2003年 / 4卷 / 01期

关键词：

D O I：

10.1016/S1566-7367(02)00229-7

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：

The removal of CO in H-2-rich gas is indispensable to the polymer electrolyte fuel cell. The promoting effect of potassium on supported Rh metal catalysts was found in the selective CO oxidation with O-2 under H-2-rich stream. Rh/SiO2 and Rh/USY exhibited low level of CO removal, however, K-Rh/SiO2 and K-Rh/USY had excellent performance in the reaction. From the results of characterization, it is suggested that the role of potassium is different on SiO2 and USY. In the case of Rh/SiO2, potassium addition enhanced the Rh dispersion, and it enhanced the TOF in the case of RhIUSY. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 4

页数：4

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