Electric Field and Mobile Oxygen Promote Low-Temperature Oxidative Coupling of Methane over La 1- x Ca x AlO 3-δ Perovskite Catalysts

Oxidative coupling of methane (OCM) over La M AlO (M = Ca, Sr, Ba; = 0, 0.1, 0.2, 0.3) in an electric field at low temperature (423 K) was investigated. Among the tested catalysts, the La Ca AlO catalyst showed the highest performance in terms of C H + C H yield (11.1%). Surface mobile oxygen species (O or O ), which were considered as active oxygen species for the OCM reaction, increased with increasing Ca doping amount, and thereby the La Ca AlO catalyst showed the best catalytic activity.