A　series　of　Pd-TiO2/Pd-Ce/TiO2　catalysts　were　prepared　by　an　equal　volume　impregnation　method.　The　effects　of　different　Pd　loadings　on　the　catalytic　activity　of　chlorobenzene　(CB)　were　investigated,　and　the　results　showed　that　the　activity　of　the　0.2%-0.3%　Pd/TiO2　catalyst　was　optimal.　The　effect　of　Ce　doping　enhanced　the　catalytic　activity　of　the　0.2%　Pd-0.5%　Ce/TiO2　catalyst.　The　characterization　of　the　catalysts　using　BET,　TEM,　H-2-TPR,　and　O-2-TPD　showed　that　the　oxidation　capacity　was　enhanced,　and　the　catalytic　oxidation　efficiency　was　improved　due　to　the　addition　of　Ce.　Ion　chromatography　and　Gas　Chromatography-Mass　Spectrometer　results　showed　that　small　amounts　of　dichlorobenzene　(DCB)　and　trichlorobenzene　(TCB)　were　formed　during　the　decomposition　of　CB.　The　results　also　indicated　that　the　calcination　temperature　greatly　influenced　the　catalyst　activity　and　a　calcination　temperature　of　550　degrees　C　was　the　best.　The　concentration　of　CB　affected　its　decomposition,　but　gas　hourly　space　velocity　had　little　effect.　H-2-TPR　indicated　strong　metal-support　interactions　and　increased　dispersion　of　PdO　in　the　presence　of　Ce.　HRTEM　data　showed　PdO　with　a　characteristic　spacing　of　0.26　nm　in　both　0.2%　Pd　/TiO2　and　0.2%　Pd-0.5%　Ce/TiO2　catalysts.　The　average　sizes　of　PdO　nanoparticles　in　the　0.2%　Pd/TiO2　and　0.2%　Pd-0.5%　Ce/TiO2　samples　were　5.8　and　4.7　nm,　respectively.　The　PdO　particles　were　also　deposited　on　the　support　and　they　were　separated　from　each　other　in　both　catalysts.