A monolithic Co-FeCo8S8 electrode for stable anion exchange membrane water electrolyzer driven by fluctuating power supply

IF 32.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Energy & Environmental Science Pub Date : 2024-11-08 DOI:10.1039/d4ee04993d

Jahangir Khan, Heming Liu, Tianhao Zhang, Xin Kang, Zhiyuan Zhang, Yuxiao Dong, Shanlin Li, Jiarong Liu, Qiangmin Yu, Bilu Liu

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引用次数: 0

Abstract

Integrating water electrolysis and green electricity offers a promising approach towards sustainable and clean energy. However, such a system demands electrodes that can swiftly and stably adapt to fluctuating power supply. Here, we developed a monolithic Co-FeCo8S8 electrode to realize robust water electrolysis under steady and fluctuated electricity owing to its strong interfacial bonding and unimpeded charge transfer between substrates and catalysts. The activated Co-FeCo8S8 electrode displays excellent oxygen evolution reaction performance with a small overpotential of 334 mV at 2,000 mA cm-2 and operates stably for 1,500 h at 500 mA cm-2. The assembled anion exchange membrane water electrolyzer needs a small cell voltage of 1.79 V at 1.0 A cm-2 and operates stably with a low voltage degradation rate of 0.115 mV h-1, surpass most reported electrolyzers. Notably, the electrolyzer shows rapid response and stable operation when coupled with fluctuating solar electricity. This work provides guidance for designing stable electrodes in practical scenarios with fluctuating power supply.

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用于波动电源驱动的稳定阴离子交换膜水电解槽的 Co-FeCo8S8 一体化电极

水电解与绿色电力的结合为实现可持续清洁能源提供了一种前景广阔的方法。然而，这种系统要求电极能够快速、稳定地适应波动的电力供应。在此，我们开发了一种整体式 Co-FeCo8S8 电极，由于其强大的界面结合力以及基底和催化剂之间畅通无阻的电荷转移，该电极可在稳定和波动的电力下实现稳健的水电解。活化的 Co-FeCo8S8 电极显示出优异的氧进化反应性能，在 2,000 mA cm-2 条件下过电位仅为 334 mV，在 500 mA cm-2 条件下可稳定运行 1,500 h。所组装的阴离子交换膜水电解槽在 1.0 A cm-2 条件下需要 1.79 V 的较小电池电压，并以 0.115 mV h-1 的低电压衰减率稳定运行，超过了大多数已报道的电解槽。值得注意的是，该电解槽在与波动的太阳能电力耦合时表现出快速响应和稳定运行。这项工作为在电源波动的实际情况下设计稳定的电极提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy & Environmental Science 化学-工程：化工

CiteScore

50.50

自引率

2.20%

发文量

349

审稿时长

2.2 months

期刊介绍： Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).