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Acta Phys. -Chim. Sin.  2010, Vol. 26 Issue (12): 3278-3284    DOI: 10.3866/PKU.WHXB20101210
CATALYSIS AND SURFACE STRUCTURE     
Effect of Preparation Method on the Activity of CuO/CeO2-ZrO2 Catalysts for Low Temperature CO Oxidation
YANG Zhi-Qiang, MAO Dong-Sen, GUO Qiang-Sheng, GU Lei
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China
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Abstract  

CuO/CeO2-ZrO2 catalysts were prepared by microwave heating decomposition (one-step approach) and by microwave heating treatment of co-precipitation followed by impregnation (two-step approach). The catalysts were characterized by X-ray diffraction (XRD), low temperature N2 adsorption/ desorption, and H2-temperature-programmed reduction (H2-TPR). The catalytic activities of the catalysts for low temperature CO oxidation were investigated using a microreactor-gas chromatograph. The results showed that the one-step approach was more beneficial to CuO dispersion on the catalyst surface because of a strong interaction between CuO and CeO2-ZrO2 and to the improved reducibility of CuO, which resulted in higher catalytic activity. We conclude that finely dispersed and small CuO particles strongly interact with CeO2-ZrO2 are responsible for the high catalytic activity toward CO oxidation and that large CuO particles that do not interact with CeO2-ZrO2 inhibit the catalytic activity.



Key wordsCatalytic activity      CuO/CeO2-ZrO2      CO oxidation      Microwave heating     
Received: 01 August 2010      Published: 29 October 2010
MSC2000:  O643  
Fund:  

The project was supported by the Leading Academic Discipline Project of Shanghai Education Committee, China (J51503) and Research Foundation of Shanghai Institute of Technology, China (KJ2008-01).

Corresponding Authors: MAO Dong-Sen     E-mail: dsmao@sit.edu.cn, dsmao1106@yahoo.com.cn
Cite this article:

YANG Zhi-Qiang, MAO Dong-Sen, GUO Qiang-Sheng, GU Lei. Effect of Preparation Method on the Activity of CuO/CeO2-ZrO2 Catalysts for Low Temperature CO Oxidation. Acta Phys. -Chim. Sin., 2010, 26(12): 3278-3284.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20101210     OR     http://www.whxb.pku.edu.cn/Y2010/V26/I12/3278

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