单原子双装饰的铜合金可实现C-C合,用于电催化降低CO2到C2+产品
Yucheng Cao1,2, Suya Chen3, Shuowen Bo4
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, Liaoning, China.
Angewandte Chemie (International ed. in English)
|May 30, 2023
概括
单原子珠装饰的铜合金电催化剂可以选择性地将二氧化碳 (CO2) 转化为有价值的多碳产品. 这种新型催化剂增强了C-C合,在二氧化碳电还原中具有优越的C2+选择性.
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:
- 单原子合金 (SAA) 催化剂在异质催化中表现有前途.
- 将二氧化碳 (CO2) 选择性电催化减少为多碳 (C2+) 产品仍然具有挑战性.
- 在CO2电还原中,C-C合对C2+产品的形成至关重要.
研究的目的:
- 探索单原子Bi装饰Cu合金 (BiCu-SAA) 电催化剂对选择性CO2减排的潜力.
- 研究BiCu-SAA催化剂中增强的C2+选择性背后的机制.
- 为了评估BiCu-SAA在苛刻条件下的稳定性和性能.
主要方法:
- BiCu-SAA电催化剂的合成和表征.
- 在流电池系统中进行电催化二氧化碳减排实验.
- 在现场表征和密度函数理论 (DFT) 计算.
主要成果:
- BiCu-SAA显示出对C2+产品的优越选择性,法拉第效率 (FE) 为73.4%.
- 催化剂在 400 mA cm-2.2 的高电流密度下保持了性能.
- 与纯Cu或Bi装饰的Cu纳米复合材料相比,BiCu-SAA显著提高了C2+的选择性.
结论:
- BiCu-SAA有效调节了对C2+产品的二氧化碳减排选择性.
- 催化剂的结构有利于CO2激活和C-C合,以提高C2+选择性.
- BiCu-SAA提供了一个有前途的途径,用于高效的电催化转化二氧化碳到有价值的多碳化学品.
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