Effect of preparation methods on Pt/alumina catalysts for the hydrogen iodide catalytic decomposition

<正>Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction,impregnation-hydrazine reduction and electroless plating methods.Their differences in the structures,specific areas and particle sizes were characterized by XRD,BET and TEM,respectively.Furthermore,their catalytic activities for the hydrogen iodide（HI）decomposition were evaluated in a fixed bed reactor.The results show that the catalyst 5%Pt/Al2O3 prepared by the electroless plating has the optimum catalytic properties for HI decomposition owing to the high dispersion of the platinum nano-particles（<5 nm）on the alumina supports.