不同活跃站点的合作,以促进CO2电还原到多碳产品在安培级的合作
Dawei Zhou1, Chunjun Chen1,2,3, Yichi Zhang1
1Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
Angewandte Chemie (International ed. in English)
|February 12, 2024
概括
这项研究引入了一种新型的铜 (Pd-Cu) 催化剂,用于有效地将二氧化碳 (CO2) 电降解为有价值的C2+产品. 催化剂在高电流密度下表现出高选择性和稳定性,推动了碳中和目标的实现.
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:
- 碳中和需要有效利用二氧化碳 (CO2).
- 电还原CO2到C2+产品是一个有前途的途径.
- 对于C2+产品来说,实现高选择性和电流密度仍然是一个挑战.
研究的目的:
- 设计和准备一个用于增强二氧化碳电减的多站点催化剂.
- 为了研究C2+产品选择性的铜 (Pd-Cu) 中原子分散的的性能.
- 了解使C2+产品产量高的催化机制.
主要方法:
- 用原子分散的合成一个多位点Pd-Cu催化剂.
- 在各种电流密度下进行电化学二氧化碳减排实验.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- Pd-Cu催化剂在二氧化碳电还原到C2+产品方面表现出色.
- 高法拉代效率 (FE) 为C2+产品的80.8%,在0.8 A cm-2下维持了20小时.
- 对于C2+产品的FE超过70%,即使在高电流密度为1.4 A cm-2.
结论:
- Pd-Cu催化剂为选择性CO2电还原到C2+产品提供了一个有前途的解决方案.
- 催化剂独特的多站点结构促进了高效的二氧化碳转化,水分离和二氧化碳转化.
- 这项工作有助于开发用于可持续化学生产和碳中和的先进催化剂.
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