在增强进化反应中可湿性和可折叠性的作用
Panpan Zhao1, Shuai Gong1, Chaoyang Zhang2
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ACS applied materials & interfaces
|May 15, 2024
概括
电极表面的可湿性和可性对进化反应 (HER) 的性能产生了重大影响. 微结构电极通过改善泡管理来增强高电流密度的HER,为气体进化反应提供设计指南.
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
- 表面科学是一门学科.
背景情况:
- 气泡动力学对于电化学气体演变中的质量转移和能量转换至关重要.
- 具有极端湿透性的微/纳米结构表面被用于改善泡脱落并减少过度潜力.
- 电极接能力对电化学反应性能的影响尚不清楚.
研究的目的:
- 研究电极微结构,可湿性和可性对演化反应 (HER) 性能的影响.
- 阐明表面特性在泡动力学和电化学效率中的作用.
- 为设计先进的微/纳米结构电极提供指导方针.
主要方法:
- 使用微支柱阵列电极与不同支柱间间距的HER实验性研究.
- 使用基于深度学习的对象检测模型来分析泡数量和出发大小.
- 对表面湿透性,接性和泡粘附效应的系统分析.
主要成果:
- 微结构在低电流密度下对泡特性的影响最小.
- 在高电流密度下,微柱阵列电极与平面电极相比,显示出明显更高的泡数量和更小的偏离尺寸.
- 表面湿度主导了HER在低电流密度 (隔离泡模式) 的性能.
- 在高电流密度 (相互作用泡模式) 中,电极接性成为决定性因素.
结论:
- 在低电流密度下,表面湿透性对HER至关重要.
- 电极接性是提高HER在高电流密度的性能的一个关键因素.
- 这项研究阐明了可湿性和可编织性的不同作用,指导了气体进化的高效微/纳米结构电极的设计.
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