| 1.0% Pd/Y2O3-ZrO2 catalysts were prepared by impregnation method. The effect of La and Ba addition on the catalytic oxidation of methane by Pd/Y2O3-ZrO2 was studied. The properties of catalysts were characterized by BET, XRD, TEM, CO-pulse and TPR techniques. The results showed that the addition of La and Ba reduced the performance of the Pd/Y2O3-ZrO2 catalysts for oxidizing CH4, and that the dispersion of active metals in the catalysts and the reduction of bulk PdO affected the oxidation activity on methane. The addition of La and Ba reduced the dispersion of the active metal Pd in Pd/Y2O3-ZrO2, made Pd easier to agglomerate after high temperature aging, and enhanced the interaction between PdO and supporting, which made PdO not easily to be reduced. |
