配对的Fe单原子由N和Se协调,作为高性能空气电池的氧气电催化剂
Hui-Min Xu1, Kai-Hang Yue2, Hong-Cheng Zhang1
1College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 12, 2025
概括
研究人员开发了一种新的催化剂FeNxSey@SNC,用于空气电池 (ZAB). 这种催化剂增强了氧气减少和演化反应,从而提高了电池的性能和耐用性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 空气电池 (ZAB) 提供高能量密度和低成本,但需要高效的电催化剂.
- 在ZABs当前的挑战包括开发负担得起和高性能催化剂的氧气减少 (ORR) 和氧气进化 (OER).
研究的目的:
- 设计和合成一个ZABs的新型催化剂.
- 为了研究ORR和OER的新材料的催化活性和耐久性.
主要方法:
- 配对的Fe单原子与Se,N原子协调的合成,在N,S编码的碳 (FeNxSey@SNC) 上得到支持.
- 物理和化学表征以确认催化剂结构.
- 在ZAB中对ORR和OER性能进行催化剂的电化学测试.
- 密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- FeNxSey@SNC表现出极好的ORR活动 (E1/2 = 0.92 VRHE) 和OER性能 (超电位 = 346 mV在10 mA cm-2).
- 使用FeNxSey@SNC的ZAB实现了高峰功率密度 (307 mW cm-2) 和特定能量密度 (760.9 mAh g-1).
- 在基于FeNxSey@SNC的ZAB中观察到优越的长期耐用性.
结论:
- 设计的FeNxSey@SNC催化剂有效地促进了ZAB中的ORR和OER.
- DFT分析显示,催化剂结构优化了Fe活性位点和电子特性,提高了催化效率.
- 这种新型催化剂显示出对推进ZAB技术的重大前景.
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