非传统的高氧化物与内部金属协调和表面中金属OH,用于持久的PEM水电解在2 A cm-2
Mingming Wang1, Zhongfeng Wang1, Xinyi Li1
1Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China.
Advanced materials (Deerfield Beach, Fla.)
|August 28, 2025
概括
具有独特的协调和表面组的高氧化物促进水电解剂的电催化. 这项创新提高了质子交换膜水电解器 (PEMWE) 的耐用性和效率.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 多组件协同效应对于电催化是至关重要的,但构成和结构空间尚未得到充分探索.
- 开发稳定高效的质子交换膜水电解剂 (PEMWE) 仍然是一个挑战.
研究的目的:
- 呈现非传统的高氧化物 (HEO) 与工程内部金属协调和表面金属OH组.
- 提高PEMWEs中的酸氧演化反应 (OER) 的电催化剂的活性和耐用性.
主要方法:
- 高氧化物 (HEO) 与内部金属集群和表面中金属OH组的制造.
- 研究HEO对抑制Ru/Ir过氧和改变反应机制的影响.
- 分析表面功能组在水网络适应和质子转移中的作用.
主要成果:
- 工程HEO表现出内部金属协调相互作用,储存电子,抑制过度氧化并促进OER的吸附物进化机制.
- 表面中等度的金属-OH组促进了适应的界面水网络,增强了质子转移并降低了质量传输阻力.
- 采用RuIrNiCoCrO2的PEMWE实现了超低电压 (1.71 V@2.0 A cm-2,2.03 V@5.0 A cm-2) 和在2.0 A cm-2时具有超过1500小时的耐用性.
结论:
- 内部协调环境和表面功能组的双重工程有效地克服了PEMWE中的活动稳定性困境.
- 开发的HEO为水电解中的耐用和高效电催化提供了一个有希望的策略.
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