整合性Ni1-Px 催化对用于低度CO2电还原
Xiuwen Shi1, Xiongyi Liang2,3,4, Lingyue Liu5
1School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
Angewandte Chemie (International ed. in English)
|October 24, 2025
概括
研究人员开发了新的Ni1-Px催化对,用于在低二氧化碳度下有效的电化学二氧化碳减排 (CO2RR). 这一突破提高了二氧化碳的利用率,并抑制了竞争中的进化反应 (HER).
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.
- 可持续化学 可持续化学
背景情况:
- 电化学二氧化碳减排 (CO2RR) 是利用可再生能源实现可持续碳利用的关键技术.
- 较低的二氧化碳度 (体积5%~15%) 显著阻碍了CO2RR的效率和选择性,原因是二氧化碳供应有限和竞争的演化反应 (HER).
- 开发先进的催化剂对于克服工业应用的这些限制至关重要.
研究的目的:
- 在低二氧化碳条件下设计和研究综合性Ni1-Px催化对 (Ni1-Px/ICPs),以提高CO2RR性能.
- 阐明反应机制,了解 (P) 在调节催化活性和选择性的作用.
- 证明有效的二氧化碳转化为二氧化碳,在工业相关的低二氧化碳度下抑制HER.
主要方法:
- Ni1-Px/ICPs的合成和表征.
- 在现场减弱总反射率表面增强红外吸收光谱 (ATR-SEIRAS) 和X射线吸收光谱 (XAS) 进行机械研究.
- H/D同位素替代实验和理论计算以确定反应路径和中间体.
- 在低二氧化碳度下的电化学性能评估.
主要成果:
- 在低二氧化碳度下,Ni1-Px/ICPs表现出更高的CO2到CO转换效率.
- 加入P调节了电化学微环境,加速了反应动力学和增强了CO2的激活.
- 观察到一种机理性过渡到朗格穆尔 - 欣舍尔伍德通路,通过相邻的Ni和P位点的合作吸附来促进.
- 鉴定出一种独特的与结合的六环环中间体 (Ni-C-O-H-O-P-Ni),促进了与质子合的电子转移,降低了反应屏障.
- 在低二氧化碳水平下实现了抑制HER和高效的CO生成.
结论:
- 在工业相关的低二氧化碳度下,整合性Ni1-Px催化对对CO2RR具有高度有效性.
- 尼和P位点之间的合作效应以及特定的结中间体的形成是提高性能的关键.
- 原子分散的催化对为推进碳利用和解决电化学化中的选择性挑战提供了一个有希望的策略.
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