Liu Tingting, Chen Chen, Pu Zonghua, Huang Qiufeng, Zhang Xiaofeng, Al-Enizi Abdullah M, Nafady Ayman, Huang Shengyun, Chen Ding, Mu Shichun
Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China.
Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
Small. 2024 Nov;20(48):e2405399. doi: 10.1002/smll.202405399. Epub 2024 Aug 25.
The oxygen evolution reaction (OER) plays a pivotal role in diverse renewable energy storage and conversion technologies, including water electrolysis, electrochemical CO reduction, nitrogen fixation, and metal-air batteries. Among various water electrolysis techniques, proton exchange membrane (PEM)-based water electrolysis devices offer numerous advantages, including high current densities, exceptional chemical stability, excellent proton conductivity, and high-purity H. Nevertheless, the prohibitive cost associated with Ir/Ru-based OER electrocatalysts poses a significant barrier to the broad-scale application of PEM-based water splitting. Consequently, it is crucial to advance the development of non-noble metal OER catalysis substance with high acid-activity and stability, thereby fostering their widespread integration into PEM water electrolyzers (PEMWEs). In this review, a comprehensive analysis of the acidic OER mechanism, encompassing the adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM) is offered. Subsequently, a systematic summary of recently reported noble-metal-free catalysts including transition metal-based, carbon-based and other types of catalysts is provided. Additionally, a comprehensive compilation of in situ/operando characterization techniques is provided, serving as invaluable tools for furnishing experimental evidence to comprehend the catalytic mechanism. Finally, the present challenges and future research directions concerning precious-metal-free acidic OER are comprehensively summarized and discussed in this review.
析氧反应（OER）在多种可再生能源存储和转换技术中起着关键作用，包括水电解、电化学CO还原、固氮以及金属空气电池。在各种水电解技术中，基于质子交换膜（PEM）的水电解装置具有诸多优势，包括高电流密度、出色的化学稳定性、优异的质子传导性以及高纯度氢气。然而，基于Ir/Ru的OER电催化剂的高昂成本对基于PEM的水分解的大规模应用构成了重大障碍。因此，推进具有高酸活性和稳定性的非贵金属OER催化物质的开发至关重要，从而促进它们广泛集成到PEM水电解槽（PEMWEs）中。在这篇综述中，对酸性OER机理进行了全面分析，涵盖吸附质演化机理（AEM）、晶格氧机理（LOM）和氧化物路径机理（OPM）。随后，对最近报道的包括过渡金属基、碳基和其他类型催化剂在内的无贵金属催化剂进行了系统总结。此外，还提供了原位/操作中表征技术的全面汇编，这些技术是提供实验证据以理解催化机理的宝贵工具。最后，本综述全面总结并讨论了无贵金属酸性OER目前面临的挑战和未来的研究方向。
