The oxygen evolution reaction (OER) is the efficiency-determining half-reaction process of high-demand, electricity-driven water splitting due to its sluggish four-electron transfer reaction. Tremendous effects on developing OER catalysts with high activity and strong acid-tolerance at high oxidation potentials have been made for proton-conducting polymer electrolyte membrane water electrolysis (PEMWE), which is one of the most promising future hydrogen-fuel-generating technologies. This review presents recent progress in understanding OER mechanisms in PEMWE, including the adsorbate evolution mechanism (AEM) and the lattice-oxygen-mediated mechanism (LOM). We further summarize the latest strategies to improve catalytic performance, such as surface/interface modification, catalytic site coordination construction, and electronic structure regulation of catalytic centers. Finally, challenges and prospective solutions for improving OER performance are proposed.

中文翻译：

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酸性介质中析氧反应的电催化研究进展与挑战

氧气析出反应（OER）由于其缓慢的四电子转移反应而成为决定性高要求的电驱动水分解反应的半反应过程。质子传导聚合物电解质膜水电解（PEMWE）已对开发具有高活性和高耐氧化性的强酸耐受性的OER催化剂产生了巨大影响，这是未来最有希望的氢燃料生成技术之一。这篇综述介绍了在理解PEMWE中的OER机制方面的最新进展，包括吸附物释放机理（AEM）和晶格氧介导的机理（LOM）。我们进一步总结了提高催化性能的最新策略，例如表面/界面改性，催化部位配位结构，催化中心的电子结构调节。最后，提出了提高OER性能的挑战和未来的解决方案。