High-Pressure Synthesis of Novel Oxygen Evolution Catalysts

Abstract

Recent advances in novel perovskite oxide catalysts synthesized under high pressure are reviewed. The simple Fe⁴⁺-perovskite oxides CaFeO₃ and SrFeO₃ demonstrate high catalytic activity for oxygen evolution reaction (OER) compared with the isoelectronic compound LaMnO₃. The quadruple Fe⁴⁺-perovskite oxide CaCu₃Fe₄O₁₂ displays a high stability in OER conditions, together with its excellent catalytic activity comparable to or exceeding state-of-the-art OER catalysts. The catalytic activity and stability for CaCu₃Fe₄O₁₂ are attributed to the characteristic crystal structure of the quadruple perovskite.