协调工程诱导了单原子Fe电催化剂的d频段中心转移,用于增强氧气减少
Huimin Liu1, Chen Wang1, Chang Liu1
1School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Zhong Road, Anshan 114051, P. R. China.
ACS applied materials & interfaces
|June 6, 2023
概括
本研究引入了一种具有独特N,S协调和基群的新型铁单原子催化剂 (Fe-SNC),证明了空气电池的增强氧降解反应 (ORR) 活性和稳定性.
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:
- 单原子催化剂 (SAC) 的性能高度依赖于当地的微环境.
- 了解协调环境对催化活动的精确调节仍然是一个挑战.
研究的目的:
- 为了合成和表征一种新的单原子催化剂,为改善氧降解反应 (ORR) 提供量身定制的协调.
- 调查硫和基协调对基于铁的SACs的催化活性和稳定性的影响.
- 评估可充电空气电池中开发的催化剂的性能.
主要方法:
- 一种嵌入单个Fe活性中心 (Fe-SNC) 的层次性多孔碳材料的合成,具有不对称的N,S协调和轴性基组.
- 对于ORR活性和稳定性的Fe-SNC催化剂的电化学表征.
- 使用Fe-SNC催化剂的可充电Zn-空气电池的组装和测试.
主要成果:
- 与商业Pt/C和其他报告的SAC相比,准备好的Fe-SNC催化剂表现出更高的ORR活性和稳定性.
- 引入S原子促进了多孔结构的形成,并优化了氧中间体吸附/脱附.
- 轴性OH组降低了ORR中间粘合强度,并优化了Fe d-带中心.
结论:
- 铁-SNC催化剂显示出有效ORR催化的巨大潜力.
- 通过精确的协调工程来定制电催化剂微环境对于提高催化性能至关重要.
- 这项工作为能源应用的电催化剂的多尺度设计提供了洞察力.
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