Three　Pt/CeO2-ZrO2-La2O3　diesel　oxidation　catalysts　were　prepared　by　two　different　routes　and　characterized　by　X-ray　diffraction,　N-2　adsorption,　temperature-programmed　reduction,　temperature-programmed　desorption,　X-ray　photoelectron　spectroscopy,　and　infrared　spectroscopy.　The　synthesis　procedure　affected　the　structure,　texture,　sulfur　resistance,　and　catalytic　activity　of　the　catalysts.　Sulfur　poisoning　increased　the　light-off　temperature　of　all　the　catalysts,　but　the　Pt/CeO2-ZrO2-La2O3　catalyst　prepared　by　depositing　ZrO2　and　La2O3　on　the　surface　of　CeO2　nanoparticles　exhibited　better　sulfur　tolerance　and　catalytic　activity　with　simulated　diesel　emission　due　to　the　high　dispersion　of　Pt　on　CeO2-ZrO2-La2O3　oxide　with　a　Zr-rich　surface.