A solid oxide fuel cell with 1 wt%Sr/La₂O₃-Bi₂O₃-Ag-YSZ membrane was applied to oxidative coupling of methane. Membrane composition had a great effect on the reaction and current generated. An increase in the current generated was accompanied by a decrease in C₂ selectivity and an increase in CH₄ conversion. There is an optimal temperature for C₂-selectivity. CH₄ conversion decreased, C₂-selectivity increased and current generated decreased slightly with a rise in total flow rates. CH₄ conversion and the current generated increased with a rise in oxygen concentration. If only C₂-selectivity and current were concerned, the higher the methane concentration, the more favourable for the cogeneration of electrical energy and ethane and ethylene. Stability of the membrane was also tested.