Intermediates Adsorption Engineering of CO2 Electroreduction Reaction in Highly Selective Heterostructure Cu‐Based Electrocatalysts for CO Production

The challenge in the artificial CO2 reduction to fuel is achieving high selective electrocatalysts. Here, a highly selective Cu2O/CuO heterostructure electrocatalyst is developed for CO2 electroreduction. The Cu2O/CuO nanowires modified by Ni nanoparticles exhibit superior catalytic performance with...

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Bibliographic Details
Published in:Advanced energy materials 2019-07, Vol.9 (27), p.n/a
Main Authors: Yang, Hao, Hu, Yu‐wen, Chen, Jun‐jie, Balogun, M.‐Sadeeq (Jie Tang), Fang, Ping‐ping, Zhang, Shanqing, Chen, Jian, Tong, Yexiang
Format: Article
Language:English
Subjects:
Adsorption
Carbon dioxide
Carbon monoxide
Catalysis
Catalytic activity
Chemical reduction
CO2 reduction reaction
Copper oxides
Cu2O nanowires
Electrocatalysts
Electrowinning
Heterostructures
Hydrogen evolution reactions
in situ Raman
intermediates
Metal compounds
Nanoparticles
Nanowires
Transition metal compounds
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Summary:The challenge in the artificial CO2 reduction to fuel is achieving high selective electrocatalysts. Here, a highly selective Cu2O/CuO heterostructure electrocatalyst is developed for CO2 electroreduction. The Cu2O/CuO nanowires modified by Ni nanoparticles exhibit superior catalytic performance with high faradic efficiency (95% for CO). Theoretical and experimental analyses show that the hybridization of Cu2O/CuO nanowires and Ni nanoparticles can not only adjust the d‐band center of electrocatalysts to enhance the intrinsic catalytic activity but also improve the adsorption of COOH* intermediates and suppress the hydrogen evolution reaction to promote the CO conversion efficiency during CO2 reduction reaction. An in situ Raman spectroscopic study further confirms the existence of COOH* species and the engineering intermediates adsorption. This work offers new insights for facile designing of nonprecious transition metal compound heterostructure for CO2 reduction reaction through adjusting the reaction pathway. A highly selective Cu2O/CuO heterostructure electrocatalyst is developed for CO2 electroreduction, which exhibits faradic efficiency (95% for CO). The hybridization of Cu2O/CuO nanowires and Ni nanoparticles could improve the adsorption of COOH* intermediates to promote the CO conversion efficiency. An in situ Raman spectroscopic study further confirms the existence of COOH* species and the engineering intermediates adsorption.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201901396