The effect of MoO3 in Ag-Mo-P-O catalysts on oxidative dehydrogenation of propane

Abstract

A series of AMP catalysts with different composition were prepared. These catalysts have been characterized by XRD, H-2-TPR, XPS, EPR, NH3-DRIFT, decomposition of isopropanol reaction. The catalytic performance of oxidative dehydrogenation of propane on these catalysts was also examined. These results indicate that "coherent interface" exists between MoO3 and AgMoO2PO4 in AMP catalysts, leading to synergetic catalytic effect. The strength of synergetic effect is due to interaction and mutual covering of the two phases. The synergetic effect modified the concentration of Mo5+, the reducibility and the acidity of AMP catalysts, leading to the influence on catalytic performance of oxidative dehydrogenation of propane to propene. The higher selectivity and yield of propene can be obtained on AMP catalysts with available quantity of MoO3.