“…Nevertheless, its nonoxidative coupling is accompanied by significant energy absorption and occurs under high temperatures with low productivity or requires a forced activation [5]. Steam reforming of methane [6,7], or its high-temperature conversion, flowing due to partial oxidation by oxygen, are much more economically feasible [8]. The use of membranes with mixed oxygen and electron conductivity allows to carry out this process effectively and relatively safe [9e13].…”