A　single　metal　Pd/γ-Al2O3　catalyst　and　a　bimetallic　Pd-Ce/γ-Al2O3　catalyst　were　prepared　by　equal　volume　impregnation　method　to　investigate　the　effect　of　CeO2　doping　on　the　catalytic　oxidation　of　toluene.　The　specific　surface　area,　surface　morphology　and　redox　properties　of　the　catalyst　were　characterized　with　N2　desorption,　SEM　and　H2-TPR.　It　was　found　that　the　doping　of　CeO2　reduced　the　specific　surface　area　of　Pd/γ-Al2O3　catalyst　to　a　certain　extent,　but　increased　the　pore　density　of　10nm,　and　the　catalyst　still　maintained　the　mesoporous　structure.　When　4%　CeO2　was　added　(mass　fraction,　the　same　below),　the　specific　surface　area　of　the　catalyst　was　reduced　to　165m2/g,　and　there　was　a　certain　degree　of　clogging　in　the　pores,　which　hindered　the　diffusion　of　pollutants　and　reaction　products,　and　reduced　the　catalytic　performance　of　the　catalyst.　The　H2-TPR　results　showed　that　there　is　a　strong　synergistic　effect　between　Pd　and　Ce.　CeO2　adjacent　to　PdO　was　more　likely　to　open　Ce-O　bond,　which　was　0.3compared　with　single　metal　0.2%　Pd/γ-Al2O3　catalyst.　The　catalyst　of　%CeO2　had　a　stronger　reduction　peak,　indicating　that　the　introduction　of　CeO2　provided　more　surface　oxygen　vacancies　for　the　catalyst　and　enhances　the　catalytic　oxidation　ability　of　the　catalyst.　in　which　the　T10　and　T90　were　reduced　by　10　and　40　respectively.　©　2019,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.