The　adsorption　behavior　and　the　photocatalytic　reforming　(PR)　process　of　2-propanol　over　Pt　(1wt.%)/TiO2　(PT)　photocatalyst　have　been　investigated　by　Fourier　transform　infrared　(FTIR)　spectroscopy.　Both　the　adsorption　complexes　and　the　reforming　intermediates　formed　on　the　PT　and　the　gas-phase　were　determined　and　identified　by　FTIR　spectra.　The　results　indicated　that　the　first　layer　surface　of　the　PT　mainly　consisted　of　chemisorbed　2-propanol　(Ti-OCH(CH3)2)　through　the　condensation　of　2-propanol　with　surface　Ti-OH　or　dissociative　adsorption　with　undercoordinated　Ti　atoms,　while　the　second　layer　consisted　of　physisorbed　2-propanol　by　interaction　with　the　chemisorbed　one　or　the　formed　H2O　via　hydrogen-bond.　Under　UV　irradiation,　a　rapidly　deprotonation　of　2-propoxide　occurred　by　the　attack　of　holes　(h+)　and　resulted　in　the　formation　of　acetone,　which　was　then　slowly　oxidized　to　acetate　and　formate　species　by　the　hydroxyl　radicals　(OH).　The　carboxylates　finally　decarboxylate　over　the　PT　to　evolve　CO2　and　CH4　via　the　photo-Kolbe　reaction.　According　to　the　results,　a　reforming　mechanism　was　proposed.　The　role　of　the　OH　groups　contained　in　2-propanol　and　its　intermediates　were　found　to　serve　as　anchors　for　their　adsorption　and　to　involve　the　formation　of　h+　transport　ways.　©　2011　Elsevier　B.V.