铜
催化作用
偶极子
选择性
法拉第效率
联轴节(管道)
Atom(片上系统)
材料科学
电流密度
乙烯
电解质
化学
无机化学
电极
物理化学
冶金
物理
嵌入式系统
有机化学
量子力学
生物化学
计算机科学
作者
Shenghua Chen,Xiaoyan Zheng,Peng Zhu,Yapeng Li,Zechao Zhuang,Hangjuan Wu,Jiexin Zhu,Chunhui Xiao,Mingzhao Chen,Pingshan Wang,Dingsheng Wang,Ya‐Ling He
标识
DOI:10.1002/anie.202411591
摘要
Deeply electrolytic reduction of carbon dioxide (CO2) to high-value ethylene (C2H4) is very attractive. However, the sluggish kinetics of C-C coupling seriously results in the low selectivity of CO2 electroreduction to C2H4. Herein, we report a copper-based polyhedron (Cu2) that features uniformly distributed and atomically precise bi-Cu units, which can stabilize *OCCO dipole to facilitate the C-C coupling for high selective C2H4 production. The C2H4 faradaic efficiency (FE) reaches 51% with a current density of 469.4 mA cm-2, much superior to the Cu single site catalyst (Cu SAC) (~0%). Moreover, the Cu2 catalyst has a higher turnover frequency (TOF, ~520 h-1) compared to Cu nanoparticles (~9.42 h-1) and Cu SAC (~0.87 h-1). In situ characterizations and theoretical calculations revealed that the unique Cu2 structural configuration could optimize the dipole moments and stabilize the *OCCO adsorbate to promote the generation of C2H4.
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