CuO-Ce0.8Zr0.2O2 composites (CuCZ) doped by transition metals (Co, Ni, Zn, Mo) as well as Co-doped CuCZ with different molar ratios of Co/Cu were prepared by a facile urea grind combustion (UGC) method and applied for CO preferential oxidation (CO-PROX) reaction in the hydrogen-rich gas mixtures. The characterizations of XRD, N-2 adsorption-desorption, SEM, TEM, XPS and H-2-TPR were used to investigate the difference in the catalytic behavior. Activity results found that the modification of Co had a positive influence on the catalytic activity of CuCZ and the optimal ratio of Co/Cu was 1/10, w...
