Pd/Ce0.8Zr0.15La0.05Oδ and Pd/Ce0.8Zr0.2O2 monolithic catalysts were prepared by an impregnation method,by which the active component(Pd)and CeO2-ZrO2-La2O3(CeO2-ZrO2)coat simultaneously impregnated on the corderite substrate.Combining with X-ray diffraction(XRD),Raman spectroscopy,Brunauner-Emmett-Teller(BET),and H2-temperature programmed reduction(H2-TPR)characterization techniques,the two kinds of catalysts were systematically investigated.It was found that the BET surface area and PdO dispersion degree ...