Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3278 -3284.doi: 10.3866/PKU.WHXB20101210

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

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   

  1. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China
  • Received:2010-08-01 Revised:2010-10-08 Published:2010-12-01
  • Contact: MAO Dong-Sen E-mail:dsmao@sit.edu.cn, dsmao1106@yahoo.com.cn
  • Supported by:

    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).

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 words: Catalytic activity, CuO/CeO2-ZrO2, CO oxidation, Microwave heating

MSC2000: 

  • O643