法拉第效率
选择性
联轴节(管道)
铜
化学
材料科学
化学物理
催化作用
电化学
电极
物理化学
有机化学
冶金
作者
Xin Yu Zhang,Zhen Xin Lou,Jiacheng Chen,Yuanwei Liu,Xuefeng Wu,Jia Zhao,Hua Gui Yang,Minghui Zhu,Sheng Dai,Hai Feng Wang,Chenghua Sun,Peng Fei Liu,Hua Gui Yang
标识
DOI:10.1038/s41467-023-43182-6
摘要
Electroreduction of CO2 to valuable multicarbon (C2+) products is a highly attractive way to utilize and divert emitted CO2. However, a major fraction of C2+ selectivity is confined to less than 90% by the difficulty of coupling C-C bonds efficiently. Herein, we identify the stable Cu0/Cu2+ interfaces derived from copper phosphate-based (CuPO) electrocatalysts, which can facilitate C2+ production with a low-energy pathway of OC-CHO coupling verified by in situ spectra studies and theoretical calculations. The CuPO precatalyst shows a high Faradaic efficiency (FE) of 69.7% towards C2H4 in an H-cell, and exhibits a significant FEC2+ of 90.9% under industrially relevant current density (j = -350 mA cm-2) in a flow cell configuration. The stable Cu0/Cu2+ interface breaks new ground for the structural design of electrocatalysts and the construction of synergistic active sites to improve the activity and selectivity of valuable C2+ products.
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