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结效应抑制了高的无形合金中的出,以在性海水中有效选择性电催化

Zongfan Zhu¹, Peng Pei¹, Na Chen¹

¹School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

|October 29, 2025

概括

一种新型的FeCoNiCrMo高形合金催化剂增强了氧气演变反应的选择性,并抑制了海水电解中的演变. 这一突破通过防止活性元素漏,使长期,稳定的电催化成为可能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

由于竞争的演化反应 (CER),海水电解在实现高氧演化反应 (OER) 选择性和长期稳定性方面面临挑战.
现有的离子层催化剂,虽然抑制了CER,但遭受了活性元素浸出和结构降解.
调节重建动力学和浸出对于海水中稳定的电催化是至关重要的.

研究的目的:

开发一种催化剂,增强OER选择性并抑制CER以实现稳定的性海水电解.
研究活性元素水抑制和结构稳定机制.
为了证明催化剂在实际电解器中的长期性能.

主要方法:

制备一个FeCoNiCrMo高形合金催化剂.
在性模拟海水 (1M KOH + 0.5M NaCl) 中进行电化学测试,以评估OER和CER的性能.
离子染色学 (IC) 和法拉代克效率分析以证实CER抑制.
催化剂和组装电解器的长期稳定性测试.
理论和现场表征以阐明稳定机制.

主要成果:

催化剂实现了低的OER超电位 (223 mV在10 mA cm-2),与纯性电解质相当.
通过IC和faradaic效率证实了进化反应 (CER) 的有效抑制.
电解仪表现出了特殊的稳定性,在500 mA cm−2下运行了1200小时,电压衰变最小 (0.118 mV h−1).
发现无形结构中的短距离有序域通过固定效应抑制活性元素出.

结论:

高形合金FeCoNiCrMo催化剂为性海水电解提供了卓越的OER选择性和稳定性.
催化剂的结构完整性,通过抑制元素液保持,是其长期性能的关键.
这项工作为开发强大的电催化剂提供了一个有前途的战略,用于具有挑战性的电化学应用.

关键词:

性海水电解的性海水电解演化反应 (CER) 是一种具有高的无形合金.泄漏 (leaching) 泄漏 (leaching) 是指一个过程.稳定的稳定性稳定的稳定性

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