Synthesis of ammonia from water and nitrogen using a compo-site cathode based on La0.6Ba0.4Fe0.8Cu0.2O3-δ-Ce0.8Gd0.18Ca0.02O2-δ: Original scientific paper. J. Electrochem. Sci. Eng. 2022;13(2):393-405. doi:10.5599/jese.1535