Platinum/cerium-zirconium-sulfate(Pt/Ce-Zr-SO_4^(2-)) catalysts were prepared by wetness impregnation.Catalytic activities were evaluated from the combustion of propene and CO.Sulfate(SO_4^(2-))addition improved the catalytic activity significantly.When using Pt/Ce-Zr-SO_4^(2-) with 10 wt%SO_4^(2-),the temperature for 90%conversion of propene and CO decreased by 75℃ compared with Pt/Ce-Zr.The conversion exceeded 95%at 240℃ even after 0.02%sulfur dioxide poisoning for 20 h.Temperature-programmed desorption of CO and X-ray photoelectron spectroscopy analyses revealed an improvement in Pt dispersion onto the Ce-Zr-SO_4^(2-) support,and the increased number of Pt particles built up more Pt^(-)-(SO_4^(2-))^(-) couples,which resulted in excellent activity.The increased total acidity and new Bronsted acid sites on the surface provided the Pt/Ce-Zr-SO_4^(2-) with good sulfur resistance.