通过协调工程促进单个Fe活性位点的电催化酸盐-氨:从理论到实验
Heying Li1, Xinyang Liu1, Ziwang Kan2
1College of Chemistry and Chemical Engineering, Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin 150025, China.
Journal of colloid and interface science
|July 18, 2024
概括
原子分散的铁--碳催化剂有效地将酸盐 (NO3-) 转化为氨 (NH3). 将和碳等异原子纳入铁活性位点 (Fe-N3C) 优化了这一关键电催化反应的性能.
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:
- 原子分散的铁--碳 (Fe-N4-C) 催化剂对电催化酸盐 (NO3-) 降解为氨 (NH3) 有希望.
- 优化单个Fe活性位点的微环境对于提高催化性能至关重要.
- 调节Fe活性位点的协调环境可以促进内在的电催化活性.
研究的目的:
- 为了研究将各种异质原子 (B,C,O,Si,P,S) 纳入Fe-N4-C催化剂的效果.
- 探索单个Fe活性站点的协调环境的调制.
- 为了增强电催化活性,用于将酸盐减少为氨.
主要方法:
- 密度函数理论 (DFT) 计算用于预测形成能量和电子性质.
- 电脑选的异构原子的结合 (B,C,O,Si,P,S).计算选.
- Fe-N3C催化剂的实验合成和电化学评估.
主要成果:
- 大多数嵌入异原子的Fe站点表现出低的形成能量,表明合成的潜力.
- 不同原子的结合调节了Fe站点的电荷再分配和d频段中心,优化了中间结合.
- Fe-N3C催化剂表现出优越的性能,具有较低的限制电位 (-0.13 V).
- 实验验证结果显示,NH3的最大产率为21.07 mg h-1 mg-1cat. 和95.74%的法拉第效率.
结论:
- 将异质原子,特别是和碳纳入Fe活性位点是设计高性能电催化剂的有效策略.
- Fe-N3C催化剂显示出有效和选择性的酸盐电还原到氨的巨大潜力.
- 这项研究为增强电催化酸盐转换的催化剂设计提供了宝贵的见解.
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