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F 兴奋剂诱导的多元组件协同活性站点建设,以实现可充电气电池的高效双功能氧气电催化
Xue Wang1,2, Kai Li3, Di Yang1
1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 31, 2024
概括
研究人员开发了一种新的调节催化剂 (F NH$_{2}$-FeNi-800),通过改善氧气电催化动力学来显著提高可充电Zn-空气电池的性能,既可以减少氧气,也可以改善进化反应.
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:
- 可充电的Zn-空气电池 (ZAB) 需要先进的电催化剂来克服缓慢的氧反应动力学.
- 整合双重活性位点用于双功能氧减氧反应 (ORR) 和氧演化反应 (OER) 是至关重要的,但由于不同的机制,具有挑战性.
研究的目的:
- 开发一种具有协同活性位点的新型催化剂,用于ZAB中高效的双功能氧气电催化.
- 调查调节在创造这些协同作用的场所中的作用.
主要方法:
- 采用调制策略,在高石墨碳基板上构建多元组件协同活性位点.
- 该战略促进了化位的形成,以固定单金属位点,确保与金属纳米颗粒的共存.
主要成果:
- 最优的催化剂,F NH$_{2}$-FeNi-800,与商业催化剂 (Pt/C+RuO$_{2}$,ΔE = 0.7 V) 相比,具有更小的潜在差距 (ΔE = 0.63 V) 的优越双功能性.
- 使用F NH$_{2}$-FeNi-800作为空气阴极的ZAB显示出明显更高的峰值功率密度 (123.8 mW cm$^{-2}$) 和更长的周期寿命 (超过660个周期),而不是Pt/C@RuO$_{2}$ (68.8 mW cm$^{-2}$,300个周期).
结论:
- 调节的催化剂为ZAB中高效的双功能氧气电催化提供了一个非常有前途的解决方案.
- 这项工作提出了在异质催化剂中设计多功能活性位点的新策略.
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