Abstract: The reactions of methane partial oxidation (POM) and methane reforming with CO2 to produce synthetic gas over Ni/TiO2 catalyst were studied.The catalyst shows good catalytic performance with high H2 selectivity for the POM reaction and good low temperature activity for the reaction of methane reforming with CO2.The activation of methane over Ni/TiO2 catalysts was investigated using MS-pulse technique in the absence of gaseous oxygen.It was found that methane activation and its oxidation products were determined by the concentration of surface oxygen species of the catalyst.Both oxygen and hydrogen spillover phenomena were observed during the interaction of methane with Ni/TiO2.The spillover oxygen and hydrogen species over the catalyst may be responsible for the good activity and carbon resistance ability of the Ni/TiO2 catalyst.

Key words: Methane, Ni/TiO₂ catalyst, Activation, Surface oxygen concentration, Spillover