Abstract
Oxidative coupling of methane (OCM) over La(1-x) M (x) AlO(3-δ) (M = Ca, Sr, Ba; x = 0, 0.1, 0.2, 0.3) in an electric field at low temperature (423 K) was investigated. Among the tested catalysts, the La(0.7)Ca(0.3)AlO(3-δ) catalyst showed the highest performance in terms of C(2)H(6) + C(2)H(4) yield (11.1%). Surface mobile oxygen species (O(2) (2-) or O(-)), which were considered as active oxygen species for the OCM reaction, increased with increasing Ca doping amount, and thereby the La(0.7)Ca(0.3)AlO(3-δ) catalyst showed the best catalytic activity.