Recent Advances in the Understanding of Lattice Oxygen Participation in Oxygen Evolution Reaction Involving Perovskite Oxide Electrocatalysts

Abstract Lattice oxygen participation is a key process in enhancing the rate of electrocatalytic oxygen evolution reaction (OER) of perovskite oxides. It helps to overcome the sluggish kinetics of OER by significantly altering the reaction pathway followed by conventional adsorbate evolution mechanism (AEM). A comprehensive understanding of the lattice oxygen‐mediated (LOM) OER mechanism is essential for designing a stable electrocatalyst with enhanced lattice oxygen involvement, leading to improved OER activity. This concept article presents a detailed understanding of the LOM OER mechanism in contrast to AEM and their manifestation in the OER activity. The recent progress in the general approaches adopted to enhance lattice oxygen participation in perovskite oxide electrocatalysts is also discussed. This article will provide guidelines for designing new perovskite‐based OER electrocatalysts with enhanced lattice oxygen participation or to improve the lattice oxygen participation in existing perovskite oxide electrocatalysts.