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阻碍热原子化使得合成Fe₂N集群连接单个Fe原子催化剂成为高效的氧降解反应

Fei-Xiang Ma¹, Xiongyi Liang², Zi-Hao Liu¹

¹Harbin Institute of Technology Shenzhen, School of Materials Science and Engineering, CHINA.

Angewandte Chemie (International ed. in English)

|May 20, 2025

概括

一个新的化诱导集群策略创建了含Fe2N集群的单原子催化剂 (SAC). 这些Fe2N集群增强Fe-N4活性位点,促进空气电池的氧降解反应 (ORR) 活性.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
电化学电化学电化学

背景情况:

单原子催化剂 (SAC) 提供高原子利用效率.
带定对于调整SAC中活性位点的电子结构至关重要.
基于铁的SAC对氧减少反应 (ORR) 是有前途的.

研究的目的:

开发一种新策略来合成具有增强活性的单原子催化剂 (SAC).
为了研究Fe2N集群作为配体对Fe-N4活性位点的影响.
评估新型催化剂在氧降解反应和空气电池中的性能.

主要方法:

化诱导的集群策略是合成Fe2N集群固的Fe-N4 SACs (Fe2Nnc/Fe1-N-C). 化诱导的集群策略是合成Fe2N集群固的Fe-N4 SACs (Fe2Nnc/Fe1-N-C).
在性介质中氧降解反应 (ORR) 活性的电化学表征.
使用合成催化剂作为空气阴极的Zn-空气电池的制造和测试.
密度函数理论 (DFT) 计算以阐明催化机制.

主要成果:

Fe2Nnc/Fe1-N-C催化剂表现出优越的ORR活性,半波潜力达到0.957V与RHE的记录.
使用Fe2Nnc/Fe1-N-C的Zn-空气电池表现出~0.658V的小充电-放电差距和1000小时以上的出色循环性.
DFT的计算证实,Fe2Nnc干改变了Fe-N4位点的电子结构,促进了ORR动力学.

结论:

化诱导集群策略有效地产生Fe2N集群固的SAC.
Fe2Nnc 配体显著增强了 ORR 的 Fe-N4 位点的催化活性.
开发的Fe2Nnc/Fe1-N-C催化剂显示出在Zn-空气电池中高性能空气阴极的巨大潜力.

关键词:

在Fe-N-C*集群中.这就是ORROR的意思.一个原子的催化剂.热原子化的热原子化

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