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在NiFe-LDH中的腐蚀驱动的Ni₃S₄梯度使耐用工业规模的水电解成为可能

Yi Liu¹, Junpo Guo^2,3, Xupo Liu²

¹Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P.R. China.

Angewandte Chemie (International ed. in English)

|October 3, 2025

概括

研究人员使用一种新的腐蚀驱动方法开发了一种新的,低成本的电催化剂,用于生产绿色. 这种Ni3S4/NiFe-LDH催化剂在水电解剂中的氧化演化反应 (OER) 中表现出高效率和耐用性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
可持续能源可持续能源

背景情况:

高效的氧化演化反应 (OER) 电催化剂对于绿色生产至关重要.
目前的催化剂面临成本,合成复杂性,动力学和耐久性方面的挑战,限制了工业应用.

研究的目的:

开发一种低成本,高效,耐用的OER电催化剂,采用一种新的合成方法.
研究合成催化剂的结构-属性关系,以提高OER性能.

主要方法:

一种腐蚀驱动的梯度工程方法,用于在铁泡上无能合成Ni3S4/NiFe-LDH异构结构.
在性和模拟海水电解质中进行电化学测试.
在纯水离子交换膜水电解仪中的性能评估.
进行光谱研究以阐明降解机制.

主要成果:

实现了低的OER超电位 (297mV在1M KOH中,326mV在500mA cm-2的模拟海水中).
在水电解剂 (1 A cm-2 在 1.85 V) 中展示了工业级的性能,稳定性超过 1,000 小时.
确定SO4(2-) 浸出和现场FeOOH形成是提高耐用性和耐腐蚀性的关键机制.

结论:

腐蚀驱动的梯度工程方法为工业级电催化剂开发提供了一个可扩展的途径.
由于独特的梯度结构和保护机制,Ni3S4/NiFe-LDH异构表现出异常的OER活性和稳定性.
这项工作为通过控制的腐蚀过程设计强大的电催化剂提供了基本的见解.

关键词:

腐蚀工程腐蚀工程电触媒溶解是一种电触媒.渐变材料是一种渐变材料.氧的演化反应反应的反应.水电解仪的水电解仪.

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