Preferential CO oxidation on Ce-promoted Pt/γ-Al2O3 catalysts under H2-rich atmosphere

被引：30
|
作者：
Liu Huanling [1 ]
Lei, Ma [1 ]
Shao Saibing [1 ,2 ]
Li Zenghe [2 ]
Wang Aiqin [1 ]
Huang Yanqiang [1 ]
Tao, Zhang [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
[2] Beijing Inst Chem Technol, Beijing 100029, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2007年 / 28卷 / 12期
关键词：
platinum; cerium; alumina; co-deposition-precipitation; carbon monoxide; preferential oxidation; fuel cell;
D O I：
10.1016/S1872-2067(08)60008-X
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Preferential CO oxidation (PROX) under hydrogen-rich atmosphere was investigated over Ce-promoted Pt/gamma-Al2O3 catalysts. The preparation procedures and conditions, including co-deposition-precipitation (CP) sequential deposition-precipitation (SP), and deposition-precipitation temperature, had great impacts on the catalytic activity. Among the catalysts investigated, the Pt-Ce/gamma-Al2O3-CP-80 catalyst prepared by co-deposition-precipitation at 80 degrees C showed the best catalytic performance with the maximum CO conversion of 85% at 120 degrees C. The catalysts prepared under different conditions were further characterized by temperature-programmed reduction (H-2-TPR) and in situ DRIFTS, and the promoting role of Ce was clarified.
引用
收藏
页码：1077 / 1082
页数：6
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