Recent Advances on Perovskite Electrocatalysts for Water Oxidation in Alkaline Medium

Alkaline water splitting is a technique utilizing renewable resource-derived electricity to generate hydrogen with high purity. The oxygen evolution reaction (OER) with sluggish dynamics is the crucial half-reaction toward electrocatalytic water splitting, which needs a non-noble metal catalyst with high performance to make the reaction process be more energy-efficient and economical. Perovskite, as a kind of price moderate, compositional adjustable, structurally stable, and highly active material, has been widely used as the catalyst for the OER under alkaline conditions. In this review, we systematically expound the OER-related catalytic mechanism, provide the evaluative criteria of catalytic performance, and then summarize the corresponding measurement methods of catalysts for the alkaline OER. Furthermore, our emphasis is given to the synthetic methods, the activity descriptors, and the performance optimization strategies of perovskite-based catalysts. Finally, we present a number of future directions on the development of more highly efficient perovskite-based catalysts for the alkaline OER.