AI 中文总结
该研究针对PEMWE在动态负载循环AST中的降解展开实验，探究了峰值电压、循环频率对降解的影响，揭示了催化剂层结构与电化学性能的关联，为PEMWE的性能优化提供了依据。
AI 中文摘要
质子交换膜水电解（PEMWE）是利用间歇性可再生能源的极具前景的技术。本研究通过实验探究PEMWE在波动电源下的降解情况，该情况以加速应力测试（AST）下的动态负载循环为特征。我们在一组简化的AST方案中重点研究动态负载关键参数的影响，这些方案旨在体现与可变可再生能源运行相关的动态负载波动的选定特征，关键参数包括峰值电压和循环频率。结果揭示了催化剂层的结构特征与电化学性能之间的复杂关系：升高的峰值电压会加速AST初始阶段的降解；而较低的循环频率可通过限制各类电阻的上升来缓解降解，较高的循环频率则主要通过增加传质电阻加剧降解，这表明系统组件存在频率敏感型劣化现象。
英文摘要
Proton exchange membrane water electrolysis (PEMWE) is a promising technology for harnessing intermittent renewable energy. This study experimentally investigates the degradation of PEMWE under fluctuating power supply, characterized by dynamic load cycling under accelerated stress test (AST). We focus on the effects of key parameters of dynamic loading, including the peak voltage and cycling frequency, in a set of simplified AST protocols designed to represent selected features of dynamic load fluctuations associated with variable renewable-energy operation. The results unveil the intricate relationship between the structural characteristics of the catalyst layer and the electrochemical performance. An elevated peak voltage accelerates the degradation in the initial phase of the AST. However, a low cycling frequency can mitigate the degradation by limiting the rise in various resistance forms, whereas a higher cycling frequency exacerbates the degradation primarily by increasing mass transport resistance, suggesting a frequency-sensitive deterioration of the system's components.
Journal refInternational Journal of Hydrogen Energy, 259 (2026), 156699
DOI：10.1016/j.ijhydene.2026.156699
