At　low　temperature,　benzene　is　decomposed　rapidly　over　Pt/TiO2　by　adding　a　small　amount　of　H-2　into　an　O-2-rich　oxidation　system.　At　120　degrees　C,　the　conversion　and　mineralization　ratio　of　benzene　is　86%　and　68%　respectively.　Effects　of　H-2　amount,　reaction　temperature　and　dispersion　of　Pt　particles　on　the　activity　and　stability　of　PO/TO2　are　studied.　Over　the　catalyst　with　high　Pt　dispersion,　the　addition　of　H-2　is　supposed　to　not　only　produce　the　energy　for　the　benzene　degradation　but　also　promote　the　generation　of　hydroxyl　radicals　to　mineralize　benzene.　Therefore,　the　activity　and　stability　of　Pt/TiO2　can　be　enhanced.　(C)　2010　Elsevier　B.V.　All　rights　reserved.