Recent advances in Ir/Ru‐based perovskite electrocatalysts for oxygen evolution reaction

Abstract

Abstract Oxygen evolution reaction (OER) is a kinetically harsh four‐electron anode reaction that requires a large overpotential to provide current and is of great importance in renewable electrochemical technique. Ir/Ru‐based perovskite oxides hold great significance for application as OER electrocatalysts, due to that their multimetal‐oxide forms can reduce the use of noble metals, and their compositional tunability can modulate the electronic structure and optimize OER performance. However, high operating potentials and corrosive environments pose a serious challenge to the development of durable Ir‐based and Ru‐based perovskite electrocatalysts. Tremendous efforts have been dedicated to improving the Ir/Ru‐based perovskite activity to enhance the efficiency; however, progress in improving the durability of Ir/Ru‐based perovskite electrocatalysts has been rather limited. In this review, the recent research progress of Ir/Ru‐based perovskites is reviewed from the perspective of heteroatom doping, structural modulation, and formation of heterostructures. The dissolution mechanism studies of Ir/Ru and experimental attempts to improve the durability of Ir/Ru‐based perovskite electrocatalysts are discussed. Challenges and outlooks for further developing Ru‐ and Ir‐based perovskite oxygen electrocatalysts are also presented.