Oxidative dehydrogenation of 1-butene over vanadium modified bismuth molybdate catalyst: an insight into mechanism

Abstract

BiMoV_x catalysts (x = 0–0.3) were prepared by co-precipitation method and investigated in the oxidative dehydrogenation (ODH) of 1-butene to 1,3-butadiene. The results show that the vanadium content has significant effects on the catalyst performance and BiMoV_0.15 exhibits the superior activity. X-ray photoelectron spectroscopy (XPS) and temperature programmed re-oxidation (TPRO) indicate that the oxygen mobility of catalysts is one of crucial factors determining catalytic performance in ODH reaction. The mechanism of oxygen migration in ODH reaction is discussed and proposed.