制备方法对CuO-Ce0．7Zr0．3O2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[1,2] 宋宇鹏[2] 贾爱平[1] 普志英[1] 罗孟飞[1] 

机构地区：[1]浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室,浙江金华321004 [2]金华职业技术学院化工与制药学院,浙江金华321017

出　　处：《分子催化》2008年第5期429-433,共5页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金资助项目(20473075)

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-凝胶法制备的CuO-Ce0.7Zr0.3O2催化剂的CO氧化活性明显高于溶胶-凝胶+浸渍法制备的CuO/Ce0.7Zr0.3O2催化剂,CuO-Ce0.7Zr0.3O2催化剂容易形成氧缺位和表面高分散CuO的颗粒较大,从而提高催化活性.CuO-Ce0.7Zr0.3O3 catalysts were prepared by two sol-gel methods and tested for CO oxidation. H2 temperature programmed reduction results revealed that the CuO particles are more finely dispersed in the catalyst prepared by sol-gel method. Also, 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 can enhance the catalytic activity.

关 键 词：CuO-Ce0.7Zr0.3O3催化剂 分散度 氧缺位 CO氧化 

分 类 号：O643.32[理学—物理化学]