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

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 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.