High‐Entropy Perovskites for Oxygen Evolution Reaction: Progress, Challenges, and Prospects

ABSTRACT Electrochemical energy storage and conversion systems powered by renewables underpin the clean energy transition, yet sluggish oxygen evolution reaction (OER) severely limits energy efficiency, driving demand for efficient OER catalysts. Perovskites stand out for adjustable electronic structures and strong catalytic activity. High‐entropy perovskites (HEPs), with multiple principal lattice elements, gain stable phases from configurational entropy and favorable electronic states via multicomponent synergy, promising OER performance. However, their vast compositional range renders trial‐and‐error development ineffective, hindering structure–activity analysis and targeted catalyst design. Covering oxide and halide HEPs, this review summarizes advances in HEP OER catalysts over four aspects: synthetic routes, performance regulation, mechanistic analysis via computation, and AI‐driven rational design (covering material screening, descriptor mining, and activity prediction). Unlike prior reviews covering separate high‐entropy oxides, standard perovskites, or general AI catalysis, this work builds a closed logical loop for HEPs spanning synthesis, experiment, mechanism, and rational design. An outlook on AI‐assisted HEP electrocatalysis is offered to inform the development of advanced OER catalytic systems.