Volume 61, Issue 31 e202205832
Research Article

Stabilization of Cu+ via Strong Electronic Interaction for Selective and Stable CO2 Electroreduction

Yixiang Zhou

Yixiang Zhou

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Yebo Yao

Yebo Yao

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Rui Zhao

Rui Zhao

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Xiaoxuan Wang

Xiaoxuan Wang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Zhenzhen Fu

Zhenzhen Fu

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Dewei Wang

Dewei Wang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Huaizhi Wang

Huaizhi Wang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Liang Zhao

Liang Zhao

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Wei Ni

Wei Ni

Beijing Aerospace Propulsion Institute, Beijing, 100076 China

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Zhiyu Yang

Corresponding Author

Zhiyu Yang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Yi-Ming Yan

Corresponding Author

Yi-Ming Yan

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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First published: 30 May 2022
Citations: 152

Graphical Abstract

Strong electronic interactions between hexagonal boron nitride (h-BN) and Cu2O protect the Cu−O bonds against electron attack through the transfer of accumulated electrons from Cu2O to h-BN. This effect stabilizes the active Cu+ species during CO2 electroreduction.

Abstract

Copper oxide-based materials effectively electrocatalyze carbon dioxide reduction (CO2RR). To comprehend their role and achieve high CO2RR activity, Cu+ in copper oxides must be stabilized. As an electrocatalyst, Cu2O nanoparticles were decorated with hexagonal boron nitride (h-BN) nanosheets to stabilize Cu+. The C2H4/CO ratio increased 1.62-fold in the CO2RR with Cu2O−BN compared to that with Cu2O. Experimental and theoretical studies confirmed strong electronic interactions between the two components in Cu2O−BN, which strengthens the Cu−O bonds. Electrophilic h-BN receives partial electron density from Cu2O, protecting the Cu−O bonds from electron attack during the CO2RR and stabilizing the Cu+ species during long-term electrolysis. The well-retained Cu+ species enhanced the C2 product selectivity and improved the stability of Cu2O−BN. This work offers new insight into the metal-valence-state-dependent selectivity of catalysts, enabling the design of advanced catalysts.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.