Production of C2 hydrocarbons and H2 from CH4 in a proton conducting cell

► La0.6Sr0.4Co0.8Fe0.2O3 was an adequate electrode for H2/C2 production from CH4. ► Up to 95% of produced H2 separated and transported to the cathode. ► A cogenerative cell producing C2 hydrocarbons from CH4 was demonstrated. ► At highest power density, the C2 rate was 20% higher than the open-circuit rate.