在酸性界面稳定*CO2中间体,使用分子分散的合金 (Cobalt Phthalocyanine) 作为CO2减少的催化剂
Shijia Feng1, Xiaojun Wang1,2, Dongfang Cheng3
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China.
Angewandte Chemie (International ed. in English)
|January 5, 2024
概括
这项研究证明了在纯酸中使用新型甲酸催化剂的无酸二氧化碳电还原 (CO2 R). 这一突破稳定了关键的中间体,实现了高的二氧化碳转化效率,没有盐分沉.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 酸性二氧化碳电还原 (CO2 R) 通过防止碳酸盐形成和二氧化碳交叉,比中性/性介质具有优势.
- 通常对于酸性CO2 R必不可少的酸盐,导致盐沉问题.
- 开发没有酸的酸性CO2 R对于实际应用至关重要.
研究的目的:
- 为了在没有的纯酸性介质中实现高效的CO2电还原 (CO2 R).
- 在酸性界面稳定关键的二氧化碳减排中间体.
- 在酸性条件下设计可增强CO2 R活性的催化剂.
主要方法:
- 使用碳纳米管支的分子分散甲酸 (CoPc@CNT) 催化剂.
- 研究了单原子活性位在稳定*CO2中间体中的作用.
- 在酸性pH下在流电池和基离子交换膜电极组件中运行CO2 R.
主要成果:
- 由于局部d状态,CoPc@CNT催化剂在酸性界面 (pH=1) 稳定了*CO2中间体.
- 通过使用流细胞,在纯酸 (pH=2) 中将CO2转化为CO的法拉第效率达到了60%.
- 在基离子交换膜电极组件中证明了73%的法拉第效率.
- 与性条件相比,在酸性条件下观察到CO2 R的增强内在活性.
结论:
- 在CoPc@CNT中的单原子位有效地稳定了酸性介质中的*CO2中间体.
- 没有酸的酸性CO2 R是可行的,并提供更好的性能.
- 这项工作促进了对酸性CO2R的中间稳定和催化剂设计的理解.
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