覆盖范围的增强加速了珀级电流中的酸性CO2电解,具有高能量和碳效率
Xiaohan Yu1, Yuting Xu2, Le Li1
1College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, the Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, China.
工程 Cu6Sn5 催化剂促进二氧化碳电还原 (CO2R) 到酸,实现高选择性和能源效率. 这种方法抑制了的演变,使得可以有效地利用二氧化碳来实现可持续的化学生产.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 可持续化学 可持续化学
背景情况:
- 酸性二氧化碳电还原 (CO2R) 可以有效地产生液体化学物质,但受到寄生进化反应 (HER) 的阻碍.
- 在高电流密度下,低选择性和能源效率 (EE) 仍然是CO2R技术面临的重大挑战.
研究的目的:
- 通过促进CO2R中间体和抑制HER来提高CO2R选择性和能源效率.
- 为高性能酸性CO2电还原设计强大的催化剂.
主要方法:
- 开发和表征Cu6Sn5催化剂,以量身定制的*OCHO亲和力和*H结合.
- 在现场电化学里埃变换红外光谱学分析中间覆盖.
- 为CO2R制造一个无阴离子,固态电解质的膜电极组件.
主要成果:
- Cu6Sn5催化剂在1.2 A cm-2和pH1.0下实现了酸 (FA) 生产的91%法拉代克效率 (FE).
- 在300小时的时间内,在0.5 A cm-2下实现了创纪录的77.4%的单通碳效率.
- 膜电极组件在130小时内在88%的FE下产生了0.36M纯FA,其中37%是全细胞EE.
结论:
- 在催化剂上增强CO2R中间覆盖,有效地促进CO2R,同时抑制HER.
- 6Sn5催化剂在酸性CO2电还原方面表现出卓越的性能,为FA生产设定了新的基准.
- 开发的固态电解质系统能够高效和选择性地产生FA,为可持续的化学合成铺平了道路.
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