平面化工程诱导了对称性破碎的单原子位点催化剂,用于增强CO2电还原
Shengjie Wei1,2, Jiexin Zhu3,4, Xingbao Chen5
1Center Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing, 100124, China.
Nature communications
|February 14, 2025
概括
平面化工程将低活性Zn-N4站点转化为高活性Zn-N3站点,以有效减少二氧化碳 (CO2RR). 这一突破提高了工业应用的催化性能和稳定性.
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:
- 传统的金属-N4站点通常在CO2RR中表现出有限的活性和选择性.
- 打破几何对称性对于提高催化性能至关重要.
- 开发有效的催化剂来减少二氧化碳对于可持续化学至关重要.
研究的目的:
- 将 Zn-N4 位点设计成一个低协调的 Zn-N3 结构.
- 为了研究平面化对CO2RR活动的影响.
- 为减少二氧化碳开发一种高度活跃和稳定的催化剂.
主要方法:
- 在Zn-N4位点的平面化工程.
- 电化学表征包括二氧化碳还原反应 (CO2RR) 试验.
- 在现场扩展的X射线吸收细结构 (EXAFS) 和密度函数理论 (DFT) 计算.
主要成果:
- 优化的催化剂 (Zn-SA/CNCl-1000) 实现了高FECO97%,在200mA/cm2的50小时内保持稳定.
- 对称性破裂的 Zn-N3 位点显著提高了 CO 部分电流密度 (271.7 mA/cm2) 和 TOF (29325 h-1).
- C-Cl 键诱导了 Zn-N4 到 Zn-N3 位点的自我重建,增强了 *COOH 吸附.
结论:
- 平面化是一种有效的策略,可以打破几何对称性并增强催化活性.
- 新的Zn-N3位点在CO2RR方面表现优越,与传统的Zn-N4位点相比.
- 这项工作为设计用于工业二氧化碳利用的先进催化剂提供了有希望的途径.
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