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Potential-induced synthesis of cavity Cu2O/Cu nanocubes for enhanced electroreduced CO2 to C2+ products.

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Title: Potential-induced synthesis of cavity Cu2O/Cu nanocubes for enhanced electroreduced CO2 to C2+ products.
Authors: Hu, Yaping1 (AUTHOR) huyaping666@163.com, Zhai, Shasha1 (AUTHOR) zhaishahxx@163.com, Guo, Yaping1 (AUTHOR) gypapply@163.com, Dang, Shan1 (AUTHOR) dangshan1983@163.com, Li, Jing1 (AUTHOR) 13137325572@163.com, Yang, Miao1 (AUTHOR) gelingmiao@126.com
Source: Research on Chemical Intermediates. Nov2025, Vol. 51 Issue 11, p6577-6591. 15p.
Subjects: Carbon dioxide reduction, Copper catalysts, Electrosynthesis, Nanostructures, Chemical products manufacturing, Electrode efficiency, Catalysis, Coupling reactions (Chemistry)
Abstract: Electrochemical reduction reaction of CO2 (CO2RR) to C1 and C2 products can be achieved on Cu-based electrocatalysts. C2 products exhibit higher energy density and economic value compared to C1 products, making them more desirable as reduction products. However, the production of C2 products on pure Cu catalysts involves multi-step proton-coupled electron transfer and C–C coupling steps, which are kinetically slow and result in poor catalytic activity and selectivity for the products. The cavity nanocubes Cu2O(0.13-AA), Cu2O(0.10-AA) and Cu2O(0.15-AA) catalysts were synthesized via wet chemical reduction by adjusting the concentration of the reducing agent. The electrochemical pre-reduction method was used to obtain Cu2O/Cu(0.13-AA), Cu2O/Cu(0.10-AA) and Cu2O/Cu(0.15-AA) catalysts for CO2RR. Cu2O/Cu(0.13 M-AA) catalyst achieves the high Faradaic efficiency (FE) of 39.98% for C2H4 and 54.76% for C2 products (C2H4, C2H6, and C2H5OH), with significant inhibition of the hydrogen evolution reaction. In situ Raman experiments demonstrate that the cavity structure of the nanocubes enhances the local concentration of *CO intermediates, thereby promoting the C–C coupling process and improving the selectivity of CO2 reduction to C2 products. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Electrochemical reduction reaction of CO2 (CO2RR) to C1 and C2 products can be achieved on Cu-based electrocatalysts. C2 products exhibit higher energy density and economic value compared to C1 products, making them more desirable as reduction products. However, the production of C2 products on pure Cu catalysts involves multi-step proton-coupled electron transfer and C–C coupling steps, which are kinetically slow and result in poor catalytic activity and selectivity for the products. The cavity nanocubes Cu2O(0.13-AA), Cu2O(0.10-AA) and Cu2O(0.15-AA) catalysts were synthesized via wet chemical reduction by adjusting the concentration of the reducing agent. The electrochemical pre-reduction method was used to obtain Cu2O/Cu(0.13-AA), Cu2O/Cu(0.10-AA) and Cu2O/Cu(0.15-AA) catalysts for CO2RR. Cu2O/Cu(0.13 M-AA) catalyst achieves the high Faradaic efficiency (FE) of 39.98% for C2H4 and 54.76% for C2 products (C2H4, C2H6, and C2H5OH), with significant inhibition of the hydrogen evolution reaction. In situ Raman experiments demonstrate that the cavity structure of the nanocubes enhances the local concentration of *CO intermediates, thereby promoting the C–C coupling process and improving the selectivity of CO2 reduction to C2 products. [ABSTRACT FROM AUTHOR]
ISSN:09226168
DOI:10.1007/s11164-025-05766-3