通过扰乱单原子Fe-N3S1催化剂的电子结构,增强氧降解反应动力学,并与亚纳米FeS集群一起进行催化
Yu Cao1, Yan Zhang1, Lin Yang1
1Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
Journal of colloid and interface science
|July 15, 2023
概括
这项研究引入了一种新的FeS/FeSA@SNC催化剂,用于氧降解反应 (ORR). 与商业/碳 (Pt/C) 相比,催化剂表现出优越的性能,为先进的电催化剂开发铺平了道路.
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
- 催化剂是一种催化剂.
背景情况:
- 单原子Fe-N4催化剂显示出氧降解反应 (ORR) 的前景.
- 在原子层面控制活跃站点协调和环境至关重要,但具有挑战性.
- 优化催化剂结构可以增强催化活性.
研究的目的:
- 通过将Fe-N3S1和FeS子纳米集群连接在S,N共碳矩阵 (SNC) 上,开发一种新的催化剂.
- 通过原子级结构控制调节氧降解反应 (ORR) 催化性能.
- 调查协调结构对Fe中心电子配置的影响.
主要方法:
- 合成FeS/FeSA@SNC催化剂通过连接Fe-N3S1和FeS子纳米集群在S,N共碳矩阵上.
- 实验测量和理论计算来分析ORR活动和动力学.
- 使用合成的催化剂制造和测试一个Zn-空气电池 (ZAB).
主要成果:
- FeS/FeSA@SNC催化剂表现出极好的ORR活性,半波潜力为0.9V (相对于RHE),表现优于商业Pt/C (0.87V).
- 独特的结构调节了Fe中心的局部电子配置,优化了ORR动力学.
- 使用这种阴极催化剂的Zn-空气电池实现了126mW cm-2.2的峰值功率密度.
结论:
- 通过控制局部协调结构来操纵单原子活性点的新策略被介绍.
- FeS/FeSA@SNC催化剂为高效的ORR电催化提供了一个有希望的替代方案.
- 这项工作为设计下一代电催化剂提供了宝贵的参考.
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