Cascade Dual Sites Modulate Local CO Coverage and Hydrogen-Binding Strength to Boost CO 2  Electroreduction to Ethylene

Li, Junjun; Chen, Yu; Yao, Bingqing; Yang, Wenjuan; Cui, Xiaoya; Liu, Huiling; Dai, Sheng; Xi, Shibo; Sun, Zhiyi; Chen, Wenxing; Qin, Yuchen; Wang, Jinlan; He, Qian; Ling, Chongyi; Wang, Dingsheng; Zhang, Zhicheng

doi:10.1021/jacs.4c00475

articleJournal of the American Chemical SocietyFeb 9, 2024Closed access

Cascade Dual Sites Modulate Local CO Coverage and Hydrogen-Binding Strength to Boost CO 2 Electroreduction to Ethylene

JLJunjun Li YCYu Chen BYBingqing Yao WYWenjuan Yang XCXiaoya Cui

Tianjin University · Southeast University · +8 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

Rationally modulating the binding strength of reaction intermediates on surface sites of copper-based catalysts could facilitate C–C coupling to generate multicarbon products in an electrochemical CO2 reduction reaction. Herein, theoretical calculations reveal that cascade Ag–Cu dual sites could synergistically increase local CO coverage and lower the kinetic barrier for CO protonation, leading to enhanced asymmetric C–C coupling to generate C2H4. As a proof of concept, the Cu3N-Ag nanocubes (NCs) with Ag located in partial Cu sites and a Cu3N unit center are successfully synthesized. The Faraday efficiency and partial current density of C2H4 over Cu3N-Ag NCs are 7.8 and 9.0 times those of Cu3N NCs,…

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176

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Topics & keywords

Topics

Keywords

Chemistry
Catalysis
Cascade
Electrochemistry
Protonation
Selectivity
Hydrogen
Copper

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