Tailoring High-Entropy Perovskite Oxides: A Comprehensive Approach for Electrochemical and Electromechanical Processes

Rising global concerns about energy and the environment have driven research on sustainable, multifunctional materials. High-entropy perovskite oxides (HEPOs) have emerged as promising candidates, owing to their structural stability, tunable band gaps, and high configurational entropy. Despite the abundant mechanical energy generated by vibrations, fluid flow, and human motion, efficient harvesting remains a significant challenge. HEPOs bridge this gap with superior photocatalytic, piezoelectric, and electrochemical performances. Synthesized via sol−gel, hydrothermal, or coprecipitation methods, their functionality is further enhanced through doping, heterojunctions, and defect engineering. These catalysts exhibit strong activity in the degradation of pollutants and key redox reactions including OER, ORR, CO2RR, and HER. Their dual responsiveness to solar and mechanical energy highlights their potential for integrated environmental remediation and clean energy applications. Overall, HEPO-based systems represent next-generation materials enabling synergistic energy harvesting and sustainable environmental solutions.