Influence of preparation methods on CuO-CeO2 catalysts in the preferential oxidation of CO in excess hydrogen

被引：40

作者：

Liu, Zhigang ^{[1
,2
]}

Zhou, Renxian ^{[1
]}

Zheng, Xiaoming ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Catalysis, Hangzhou 310028, Peoples R China

[2] Hunan Univ, Sch Chem & Chem Engn, Changsha 410082, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2008年 / 17卷 / 02期

关键词：

CuO-CeO(2); preparation method; preferential oxidation; CO; fuel cell;

D O I：

10.1016/S1003-9953(08)60038-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Influence of three different preparation methods, i.e. impregnation, coprecipitation, and inverse coprecipitation, on the preferential oxidation of CO in excess hydrogen (PROX) over CuO-CeO(2) catalysts has been investigated and CuO-CeO(2) catalysts are characterized using BET, XPS, XRD, UV Raman, and TPR techniques. The results show that the catalysts prepared by coprecipitation have smaller particle sizes, well-dispersed CuO(x) species, more oxygen vacancies, and are more active in the PROX than those prepared by the other methods. However, the inverse coprecipitation depresses the catalytic performance of CuO-CeO(2) catalysts and causes the growth of CuO-CeO(2) because of different pH value in the precipitation process.

引用

页码：125 / 129

页数：5

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