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Research Article

Efficient electrocatalytic CO2 reduction to C2+ chemicals on internal porous copper

Sha Wang1, Jianling Zhang1,2( ), Lei Yao3, Yisen Yang1,2, Lirong Zheng3, Bo Guan1, Yingzhe Zhao1,2, Yanyue Wang1,2, Buxing Han1, Xueqing Xing3
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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Graphical Abstract

Internal porous structure of Cu was designed, which favors the enrichment of *CO intermediates and the subsequent C–C coupling pathway.

Abstract

To improve the electrocatalytic conversion of carbon dioxide (CO2) into C2+ products (such as ethylene (C2H4) and ethanol (CH3CH2OH), etc.) is of great importance, but remains challenging. Herein, we proposed a strategy that directs the C–C coupling pathway through enriching and confining the carbon monoxide (CO) intermediate to internal pores of Cu nanocubes, for electrocatalytic reduction of CO2 into C2+ chemicals. In H-type cell, the Faraday efficiency (FE) for ethylene and ethanol reaches 70.3% at −1.28 V versus the reversible hydrogen electrode (vs. RHE), with a current density of 47.9 mA·cm−2. In flow cell, the total current density is up to 340.3 mA·cm−2 at −2.38 V (vs. RHE) and the FE for C2+ products is 67.4%. Experimental and theoretical studies reveal that both the CO intermediate adsorption and C–C coupling reaction on such an internal porous catalyst are facilitated, thus improving CO2-to-C2+ conversion efficiency.

Keywords

internal porous structurecarbon dioxide (CO2) electroreductionC2+ products

Electronic Supplementary Material

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Nano Research
Volume 16 Issue 8,
August 2023
Pages 10779-10786
DOI: 10.1007/s12274-023-5791-y
Cite this article:
Wang S, Zhang J, Yao L, et al. Efficient electrocatalytic CO2 reduction to C2+ chemicals on internal porous copper. Nano Research, 2023, 16(8): 10779-10786. https://doi.org/10.1007/s12274-023-5791-y
Topics:
Electrolytic reduction

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Received: 10 March 2023
Revised: 20 April 2023
Accepted: 02 May 2023
Published: 17 June 2023
© Tsinghua University Press 2023
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