针对选择性CO2的CO和H覆盖范围,将电还原调整为CH4或C2H4
Yangshen Chen1, Naixin Lyu1, Junbo Zhang1
1Laboratory of Advanced Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 22, 2023
概括
合成了三级铜合金电催化剂,以控制选择性减少二氧化碳的中间体. 用和调催化剂进行高甲或乙烯生产的兴奋剂,为产品定制提供了一种策略.
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:
- 电化学二氧化碳还原反应 (CO2RR) 的选择性取决于催化剂表面中间体,如*CO和*H.
- 三级铜合金为CO2RR提供可调节的电子特性.
研究的目的:
- 合成和研究Cu-Zn-Mn三元合金用于选择性电化学CO2减排.
- 为了将催化剂成分与*CO和*H中间体的覆盖率相关联.
- 为了定制C1 (例如,CH4) 和C2 (例如,C2H4) 产品的生产.
主要方法:
- 合成Cu_xZn_yMn_z三元合金电催化剂,使用不同的Zn和Mn合剂.
- 二氧化碳减排性能的电化学表征,包括部分电流密度和法拉第效率.
- 对催化剂表面的中间覆盖面 (*CO和*H) 的分析.
主要成果:
- Cu8ZnMn催化剂实现了高的CO2到CH4部分电流密度 (-418 ± 22 mA cm−2) 和55 ± 2.8%的法拉第效率.
- Cu8Zn6Mn催化剂表现出高的CO2到C2H4部分电流密度 (-440 ± 41 mA cm−2) 和58 ± 4.5%的法拉第效率.
- 兴奋剂增强了*CO结合,促进了C2产物,而兴奋剂则有利于*H结合,促进了C1产物.
结论:
- 三级Cu-Zn-Mn电催化剂使得可调节的二氧化碳减排选择性成为可能.
- 控制Zn和Mn兴奋剂为制造特定CO2RR产品的Cu基催化剂提供了一个合理的策略.
- 这项工作为有效的电化学二氧化碳转化提供了对催化剂设计的见解.
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