超稳定的PEM水电解剂的单原子Sb化RuSbOx双功能催化剂
Ziqiang Niu1,2, Zelong Qiao1, Panpan Sun1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 17, 2025
概括
开发了一种新型的单原子反氧化 (RuSbOx) 催化剂,显著提高了质子交换膜水电解仪 (PEMWE) 的稳定性和效率. 这种无 Pt/Ir 催化剂为清洁生产提供了具有成本效益的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 质子交换膜水电解器 (PEMWE) 需要具有成本效益和稳定的双功能催化剂.
- 基于 (Pt) 和 (Ir) 的催化剂价格昂贵,限制了PEMWE的广泛采用.
- 开发无Pt/Ir替代品对于推进绿色生产至关重要.
研究的目的:
- 为小微企业开发一种高效且稳定的无Pt/Ir双功能催化剂.
- 调查单原子反 (Sb) 兴奋剂在氧化 (RuSbOx) 催化剂中的作用.
- 了解增强催化活性和稳定性背后的机制.
主要方法:
- 合成单原子的Sb-合的RuSbOx.
- 电化学测试氧进化反应 (OER) 和进化反应 (HER) 的稳定性.
- 在现场拉曼光谱和分子探测技术.
- 密度函数理论 (DFT) 的计算.
主要成果:
- RuSbOx表现出极好的稳定性:150小时的OER和300小时的HER在100mA cm-2.2时.
- 采用RuSbOx的PEMWE在低电池电压 (1.72V) 时实现了1.0 A cm−2,并在200 mA cm−2.2下稳定运行了200小时.
- 单原子Sb化重建了界面水结构,通过促进deprotonation和降低表面酸度来增强OER活性和稳定性.
结论:
- 单原子 Sb 兴奋剂在酸性介质中作为 Ru 基催化剂的结构稳定剂.
- 开发的RuSbOx催化剂为PEMWE应用提供了超高的稳定性和效率.
- 该战略为设计用于水电解的先进,具有成本效益的电催化剂提供了一条途径.
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