短暂悬挂的Fe (III) -N-C单原子催化剂的活性部位,用于高效的电化学CO2降解反应
Yun-Ze Qiu1, Xiao-Meng Liu1, Wenying Li1
1Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Angewandte Chemie (International ed. in English)
|February 3, 2025
概括
Fe ((III) -N-C 单原子催化剂表现出优越的电化学二氧化碳减排活性. 它的活性部位被确定为FeN1C3-C,具有独特的悬挂Fe原子,可增强CO2激活和催化性能.
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.
- 计算化学的计算化学
背景情况:
- 在添加碳 (Fe-N-C) 上的铁单原子催化剂 (SAC) 对电化学二氧化碳还原反应 (eCO2RR) 是有前途的.
- 对于Fe (III) -N-C的确切活性部位结构和机制仍在争论中,FeN4-C模型经常被错误地归因.
研究的目的:
- 为了确定Fe (III) -N-C SACs的正确结构模型.
- 阐明反应机制,并了解优异eCO2RR活动的起源.
主要方法:
- 密度函数理论 (DFT) 在大法典集团中的计算.
- 与高级波函数理论方法进行基准测试.
- 确定符合性活体部位模型,并分析中间结构.
主要成果:
- 对Fe (III) -N-C的符合模型被确定为FeN1C3-C.
- 揭示了一个新的悬挂活性位点,Fe原子在其中暂时脱离碳支,保持Fe-N结合.
- 这种灵活的悬挂位置促进了易于CO2激活和复杂的反应网络,从而提高了eCO2RR活动.
结论:
- 具有悬挂活性位点的FeN1C3-C模型解释了Fe(III) -N-C催化剂的高性能.
- 这些发现为Fe-N-C SACs的结构-活性关系提供了新的见解.
- 为设计下一代高活性单原子催化剂提供了基础.
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