Synthesis of highly active CuO-CeO2 nanocomposites for preferential oxidation of carbon monoxide at low temperatures

被引：41

作者：

Chung, Liang-Chor ^{[1
]}

Yeh, Chuln-Tih ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan

[2] Yuzn Ze Univ, Fuel Cell Ctr, Tao Yuan 32003, Taiwan

来源：

CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 05期

关键词：

preferential oxidation of CO; synthetic reformates; copper catalyst; ceria;

D O I：

10.1016/j.catcom.2007.07.041

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：

CuO-CeO2 nanocomposites were prepared by coprecipitation of nitrates at various pH values and used for preferential oxidation (PROX) of CO in a hydrogen rich gas. Precipitation at high pH led to a high concentration of CeO2 nucleation and abundant active Cu-i sites (Cu atoms at interface between CuO and CeO2) on prepared nanocomposites. The reducibility of (CuO)-O-i and its turnover frequency for PROX were increased with the pH during preparation of nanocomposites. Catalysts coprecipitated at pH >= 12 exhibited excellent CO conversion (>99%) and distinguished CO selectivity (88%) for PROX at a low reaction temperature of 125 degrees C. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：670 / 674

页数：5

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