制备方法对15%CuO-Ce_(0.7)Zr_(0.3)O_2催化剂的氧缺位和CO氧化活性的影响  

Effect of Preparation Method on Catalytic Activity of CO Oxidation over CuO-Ce_(0.7)Zr_(0.3)O_2 Catalysts

作　　者：洪庆红[1] 林鸿[1] 宋宇鹏[1] 吴昌胜[1] 

机构地区：[1]金华职业技术学院,浙江金华321007

出　　处：《金华职业技术学院学报》2009年第3期49-53,共5页Journal of Jinhua Polytechnic

基　　金：2005年金华市科技局资助项目(2005-1-167)

摘　　要：采用溶胶-凝胶法和溶胶-凝胶+浸渍法两种方法制备了CuO-Ce0.7Zr0.3O2催化剂,并对催化剂进行了XRD、Raman等表征,考察了催化剂的CO氧化性能。研究结果表明,溶胶-凝胶+浸渍法制备的CuO/Ce0.7Zr0.3O2催化剂CO氧化活性明显高于溶胶-凝胶法制备的CuO-Ce0.7Zr0.3O2催化剂的性能,CuO-Ce0.7Zr0.3O2催化剂表面CuO分散度高,从而提高催化活性。CuO-Ce0.7Zr0.3O2 catalysts were prepared by two sol-gel methods and tested for CO oxidation. H2 temperature programmed reduction results revealed that the CuO particles were more finely dispersed in the catalyst prepared by sol-gel method. Raman spectra of the catalysts indicated that more oxygen vacancies were formed in the catalyst prepared by sol-gel method than that by sol-gel impregnation method. These two facts contributed to the higher activity for the sol-gel The catalyst prepared by sol-gel method was easy to form oxygen vacancies and larger size finely dispersed CuO, which could enhance the catalytic activity.

关 键 词：CuO-Ce0.7Zr0.3O2催化剂 分散度 氧缺位 CO氧化 

分 类 号：O643.32[理学—物理化学]