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分离溶剂效应:化硫酸结构和催化剂层稳定性在PEM水电解中

Jong-Hyeok Park^1,2, Jin-Soo Park^1,2,3

¹Department of Civil, Environmental, and Biomedical Engineering, The Graduate School, Sangmyung University, Cheonan 31066, Republic of Korea.

|January 27, 2026

概括

在本研究中,使用烯糖醇溶剂,将离子体结构对水电解的催化剂层的影响分离出来. 较短的侧链离子体通过优化薄膜形成和减少降解,提供更好的性能和耐用性.

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

背景情况:

perfluorinated sulfonic acid ionomer (PFSI) 分散是质子交换膜 (PEM) 水电解的催化剂层 (CLs) 中的关键结合物.
溶剂选择显著影响PFSI行为,混不同离子体结构的比较和它们对CL性能的影响.

研究的目的:

孤立离子体结构 (侧链结构和等效重量) 对演化反应 (HER) 催化剂层的影响.
建立一个标准化溶剂平台 (甘醇) 以可靠地比较PFSI结合剂.

主要方法:

使用基醇 (PG) 单溶剂系统,为五种不同的离子体准备PFSI分散剂.
使用电化学测试 (电流密度,欧姆超电位) 和表面分析 (接触角测量) 进行了催化剂层的特征化.
通过加速应力测试-2 (AST-2) 评估耐用性,并通过传输电子显微镜 (TEM) 分析材料变化.

主要成果:

PG溶剂分解离子体聚合物,并减少催化剂-离子体聚合物,促进独立于等量重量的薄膜形成.
CLs的疏水性和疏气性与离子体结构相关,相当重量下降增加硫酸密度.
在PG条件下,短侧链 (SSC) 和中侧链 (MSC) 离子体表现出较高的电流密度和更好的耐用性,而不是长侧链 (LSC) Nafion.
在TEM分析中,LSC Nafion-based CLs显著增长了Pt,而SSC/MSC离子体则呈现出最小的降解.

结论:

在控制溶剂效应时,离子体结构,特别是侧链结构和同等重量是催化剂层性能和稳定性的主要决定因素.
建议在PEM水电解中使用相当重量约为980的短侧链 (SSC) 离子体,以获得最佳性能和稳定性.
中侧链 (MSC) 离子体最大化电流密度,同时提供适度的稳定性.

关键词:

催化剂层是一种催化剂层.离子体薄膜形成.perfluorosulfonic 酸的离子体离子体质子交换膜水电解水的电解.侧链化学侧链化学

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