物理化学学报 >> 2011, Vol. 27 >> Issue (05): 1163-1168.doi: 10.3866/PKU.WHXB20110443

催化和表面科学 上一篇    下一篇

微波加热分解法制备CuO-Ce0.6Zr0.4O2及其催化CO氧化性能

杨志强, 毛东森, 吴仁春, 俞俊, 王倩   

  1. 上海应用技术学院, 化学与环境工程学院, 上海 200235
  • 收稿日期:2010-12-22 修回日期:2011-02-14 发布日期:2011-04-28
  • 通讯作者: 毛东森 E-mail:dsmao@sit.edu.cn, dsmao1106@yahoo.com.cn
  • 基金资助:

    上海市教委重点学科建设项目(J51503)资助

Preparation of CuO-Ce0.6Zr0.4O2 by Microwave Heating Decomposition and Its Catalytic Property for CO Oxidation

YANG Zhi-Qiang, MAO Dong-Sen, WU Ren-Chun, YU Jun, WANG Qian   

  1. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China
  • Received:2010-12-22 Revised:2011-02-14 Published:2011-04-28
  • 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).

摘要:

采用微波加热分解法制备了一系列CuO含量(0-25%, w)不同的CuO-Ce0.6Zr0.4O2催化剂, 并用X射线衍射(XRD)、透射电镜(TEM)、N2吸附-脱附(BET)和H2程序升温还原(H2-TPR)技术对催化剂进行了表征, 利用色谱流动法考察了其催化CO低温氧化性能. 结果表明: 当CuO含量为15%时, 所制备催化剂的催化活性最佳. 在催化剂中存在三种不同类型的铜物种, 即高分散、小颗粒和大颗粒的CuO. 催化剂表面高分散和小颗粒的CuO有利于催化活性的提高, 而大颗粒的CuO对催化活性具有抑制作用.

关键词: 微波加热, 氢氧化四氨合铜, CuO-Ce0.6Zr0.4O2催化剂, CO氧化

Abstract:

A series of CuO-Ce0.6Zr0.4O2 catalysts with different contents (0-25%, w) of CuO were prepared by microwave heating decomposition and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption-desorption (BET), and temperature-programmed reduction with hydrogen (H2-TPR). The activities of the catalysts for CO oxidation were evaluated using a microreactor-gas chromatograph system. The results show that the CuO-Ce0.6Zr0.4O2 catalyst exhibits the best catalytic activity for CO oxidation at a CuO content of 15%. Three copper species are present in the catalysts, i.e., highly dispersed, small and large CuO particles. The highly dispersed and small CuO particles are responsible for the promotion of catalytic activity while the large CuO particles inhibit catalytic activity.

Key words: Microwave heating, Cu(NH3)4(OH)2, CuO-Ce0.6Zr0.4O2 catalyst, CO oxidation

MSC2000: 

  • O643