Study on the Catalytic Performance of CuO-CeO2 Catalysts Doped with Transition Metal Oxides for Selective CO Oxidation

摘要

A series of CuO-CeO2 catalysts doped with transition metal oxides were prepared by co-precipitation method for selective CO oxidation and the effects of the additives on the catalytic performance were examined by H2-TPR, in-situ DRIFTS techniques. The results showed that the main CO adsorption site on CuO-CeO2 series catalysts was Cu+ species. The catalytic activity at lower temperatures was related to the CO desorption. The doping of ZnO improved the catalytic activity evidently and the CO conversion and selectivity of Cu1Zn1Ce9Od could reach 99.9% and 76.4% at 160°C, respectively. ZnO not only stabilized the reduced Cu+ species, but also increased the capacity of CO adsorption.