Electrochemical Synthesis of Ammonia Directly from Wet N2Using La0.6Sr0.4Fe0.8Cu0.2O3-δ-Ce0.8Gd0.18Ca0.02O2-δComposite Catalyst

La 0.6 Sr 0.4 Fe 0.8 Cu 0.2 O 3- δ was prepared via combined EDTA-citrate complexing sol-gel process, characterized by X-ray diffraction and SEM. Ammonia synthesis was successfully synthesized directly from wet nitrogen based on an electrolytic cell using La 0.6 Sr 0.4 Fe 0.8 Cu 0.2 O 3- δ -Ce 0.8 Gd 0.18 Ca 0.02 O 2- δ composite cathode, Ce 0.8 Gd 0.18 Ca 0.02 O 2- δ -(Li/Na/K) 2 CO 3 composite electrolyte and Sm 0.5 Sr 0.5 CoO 3- δ -Ce 0.8 Gd 0.18 Ca 0.02 O 2- δ composite anode. The O 2− conduction of the composite electrolyte was used for ammonia synthesis. The maximum ammonia formation rate of 5 × 10 −11 mol s −1 cm −2 was observed at 400°C when a voltage of 1.4 V was applied which is two orders of magnitude higher than that of previous report when ammonia was synthesized from N 2 and H 2 O at 650°C. Besides ammonia, hydrogen is also co-generated at the cathode.