在Fe中的协同催化――在以添加碳为的二原子位点中,用于增强CO2的电还原
Dapeng Meng1, Jingxuan Zheng1, Junxin Guo1
1National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
具有铁和 (Fe─In) 的异核二原子催化剂显著提高了电化学二氧化碳 (CO2RR) 减少到一氧化碳的速度. 这一突破为可持续的化学生产提供了高效率和原子利用.
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:
- 二原子催化剂提供了高原子利用率和多个活性点,用于电化学二氧化碳减排 (CO2RR).
- 在原子级设计和理解二原子催化剂中的协同作用机制方面存在挑战.
研究的目的:
- 在基合碳 (FeIn DA/NC) 上在二原子位点构建异核Fe─.
- 为了研究Fe─在CO2RR中的二原子位点中的协同催化机制.
主要方法:
- 铁的合成――在化碳 (FeIn DA/NC) 上固定的二原子位点中.
- 电化学 CO2RR 的性能评估.
- 在现场减弱总反射表面增强红外吸收光谱 (ATR-SEIRAS).
- 密度函数理论 (DFT) 的计算.
主要成果:
- FeIn DA/NC 在 -0.4 到 -0.7 V 的范围内实现了超过 90% 的 CO 法拉代克效率,在 -0.5 V 达到 99.1% 的峰值.
- 协同作用的Fe─在相互作用中产生了不对称的电荷分布,增强了CO2吸附和*COOH形成.
- 铁结构通过增加*OH吸附能量来促进水分离.
结论:
- Fe─In 双原子位点通过协同电子效应有效地促进了 CO2RR.
- 这种原子规模的设计为开发高效的二原子电催化剂提供了途径.
- 这些发现有助于理解CO2转换的多站点协同催化剂.
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