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生物模拟方形金字塔式N₁-Fe-N₄单个位点,具有优化电子分布,用于高效的氧降解反应

Jiaxin He¹, Qingyi Li¹, Daomeng Liu¹

¹Institutes of Physical Science and Information Technology, Anhui Graphene Carbon Fiber Materials Research Center, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, China.

Small (Weinheim an der Bergstrasse, Germany)

|February 24, 2025

概括

一种具有独特N1-Fe-N4位点的新型铁单原子催化剂 (SA-FeN5/HPC) 提高了Zn-空气电池的氧降解反应 (ORR) 活性和耐久性,优于替代品.

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:

单原子铁--碳 (Fe-N-C) 催化剂被探索为氧降解反应 (ORR) 的替代品.
现有的Fe-N-C催化剂在吸附和激活反应中间体方面存在局限性,阻碍了效率.

研究的目的:

开发一种高协调性单原子催化剂,提高ORR性能.
为了研究轴性联体对Fe活性部位的影响,以改善ORR动力学.

主要方法:

合成一个Fe单原子催化剂,其生物模拟方形金字塔N1-Fe-N4位点由蜂状的多孔碳 (SA-FeN5/HPC) 支持,采用超分子封闭热解.
理论计算以了解催化剂的电子结构和吸附特性.
在Zn-空气电池中对SA-FeN5/HPC进行ORR活性和耐久性的电化学测试.

主要成果:

该SA-FeN5/HPC催化剂表现出优异的电催化ORR活性,半波潜力为0.93V与RHE.
催化剂在电化学测试中表现出优越的耐用性.
使用SA-FeN5/HPC的Zn-空气电池表现出色.

结论:

N1-Fe-N4协调部位有效调节电子结构和中间吸附,加速ORR动力学.
开发的高协调性单原子催化剂显示出在储能装置中的实际应用的巨大潜力.
这项研究为设计先进的单原子电催化剂提供了新的策略.

关键词:

在Zn-空气电池.原子Fe站点是一个原子Fe站点.债框架债框架氧降解反应反应的氧降解反应方形金字塔形状的正方形金字塔.

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