碱性介质中氧进化反应镍铁基电催化剂的稳定性挑战与机遇

Yujun Han, Jingyi Wang, Yuhang Liu, Tianqi Li, Tongzhou Wang, Xinyue Li, Xinran Ye, Guodong Li, Jihong Li, Wenbin Hu, Yida Deng
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引用次数: 0

摘要

水分离是生产绿色氢气的关键过程,有助于推动循环经济的发展。然而,水分离装置的大规模应用主要受到阳极氧进化反应(OER)迟缓的阻碍。因此,开发和设计高效的 OER 催化剂是一个重要目标。镍铁合金基催化剂因其价格低廉、储量丰富和内在活性高而被广泛研究,是极佳的 OER 电催化剂。然而,它们仍然面临长期稳定性的挑战。迄今为止,很少有关于提高 OER 耐久性的系统性策略的报道。本综述介绍了各种先进的镍铁合金催化剂。此外,还总结了镍基电催化剂在碱性介质中的 OER 稳定性挑战,包括铁偏析、结构降解和从基底剥离。更重要的是,本文强调了提高 OER 稳定性的策略,并讨论了促进未来碱性水电解稳定性研究的机会。本综述介绍了镍铁基电催化剂和阴离子交换膜 (AEM) 电解槽的设计策略,以克服 OER 中的稳定性挑战,同时强调了碱性介质中长期稳定性的重要性及其对实现大规模商业化的意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Stability challenges and opportunities of NiFe-based electrocatalysts for oxygen evolution reaction in alkaline media

Stability challenges and opportunities of NiFe-based electrocatalysts for oxygen evolution reaction in alkaline media

Water splitting is a critical process for the production of green hydrogen, contributing to the advancement of a circular economy. However, the application of water splitting devices on a large scale is primarily impeded by the sluggish oxygen evolution reaction (OER) at the anode. Thus, developing and designing efficient OER catalysts is a significant target. NiFe-based catalysts are extensively researched as excellent OER electrocatalysts due to their affordability, abundant reserves, and intrinsic activities. However, they still suffer from long-term stability challenges. To date, few systematic strategies for improving OER durability have been reported. In this review, various advanced NiFe-based catalysts are introduced. Moreover, the OER stability challenges of NiFe-based electrocatalysts in alkaline media, including iron segregation, structural degradation, and peeling from the substrate are summarized. More importantly, strategies to enhance OER stability are highlighted and opportunities are discussed to facilitate future stability studies for alkaline water electrolysis. This review presents a design strategy for NiFe-based electrocatalysts and anion exchange membrane (AEM) electrolyzers to overcome stability challenges in OER, which also emphasizes the importance of long-term stability in alkaline media and its significance for achieving large-scale commercialization.

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