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一个中间层定NiMo/MoO₂电催化剂用于进化反应在高电流密度的阳离子交换膜水电解中

Gaoxin Lin^1,2, Anrui Dong^1,2, Zhiheng Li^1,2

¹Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou, Zhejiang, 310030, China.

Advanced materials (Deerfield Beach, Fla.)

|May 16, 2025

概括

没有贵金属的催化剂对于通过离子交换膜水电解 (AEM-WE) 实现可持续的生产至关重要. 这项研究开发了一种强大的NiMo/MoO2催化剂,在高电流密度下显示出高活性和耐用性.

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
可持续能源可持续能源

背景情况:

没有贵金属的电极对于有效的离子交换膜水电解 (AEM-WE) 产生可持续的气至关重要.
在AEM-WE中,高电流密度会产生大量的气泡,阻碍质量转移并引起压力,这挑战了催化剂设计.

研究的目的:

开发一种新的,强大的,高度活跃的无贵金属催化剂,用于AEM-WE中的进化.
为了应对高电流密度的气泡管理和机械应力方面的挑战.

主要方法:

采用一种易于化学腐蚀的方法,在泡 (NF) 基板上合成了一种间层固定的NiMo/MoO2催化剂.
在现场使用拉曼和X射线衍射分析来研究催化剂的结构和性能.
安离子交换膜水电解 (AEM-WE) 装置被组装和测试.

主要成果:

合成的NiMo/Int/NF催化剂表现出高演变活性,其超电位为80.2±3.53mV,在1000mA cm−2.2.
催化剂表现出极好的耐用性,在测试条件下保持稳定5000小时.
使用NiMo/Int/NF组装的AEM-WE设备在1000mA cm-2下实现了1.78V的低电池电压,超过了Pt/C催化电池 (1.94V),并显示了3000小时的稳定性.

结论:

层间定策略有效地减轻了泡冲击,并在高电流密度下增强了催化剂的附着性和强度.
异构的NiMo/MoO2催化剂通过增加局部pH值和高成分利用,加速演变反应.
这种无贵金属的催化剂通过AEM-WE提供了一种有前途的解决方案,用于通过AEM-WE有效和持久地生产气.

关键词:

离子交换膜水电解水的电解.不同结构异构结构.气演化反应反应的反应机械稳定性机械稳定性

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