Preparation,characterization and catalytic behavior of nanostructured mesoporous CuO/Ce_(1-x)Zr_xO_2 catalysts for CO oxidation

CuO/Ce1-xZrxO2 catalysts were perpared and characterized and catalytic behavior of the catalysts were researched.The metal Cu was used as the active species,Ce-Zr solid solution used as the act supports.For the part of active supports,the effects of preparation methods,the structure properties of samples were characterized by XRD,BET surface area etc.measurements.The surface active species were characterized with DRUV-vis and H2-TPR.The highly dispersed Cu species were thought to be the active sites.For the part of active supports,the cataylitic performances of CuO/Ce1-x ZrxO2 catalysts were investigated with different preparation methods and Ce/Zr ratio.It was found that the catalyst prepared by suffuctant-assisted method with CuO loading 14%,Ce/Zr ratio 9/1 has the best cataylstic performance.XRD,Raman and H2-TPR results show that the highly dispersed CuO,highly dispersed CuO clusters and the strong synergistic effect between CuO and active supports were responsible for the high catalytic activity of the catalysts for low-temperature CO oxidation.