Citation: Tian Wang, Xiaohui Ma, Xihong Liu, Abdelkader Labidi, Dongjin Wan. Selective regulation of CO₂ electroreduction via tandem reactions over copper-based bimetallic catalysts[J]. Chinese Chemical Letters, ;2026, 37(11): 112700. doi: 10.1016/j.cclet.2026.112700 shu

Selective regulation of CO₂ electroreduction via tandem reactions over copper-based bimetallic catalysts

Tian Wang ^{a, *,} ,
Xiaohui Ma ^a ,
Xihong Liu ^a ,
Abdelkader Labidi ^b ,
Dongjin Wan ^{a, *,}

a.
School of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
b.
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China

wangtian@haut.edu.cn

djwan@haut.edu.cn

Received Date: 25 October 2025
Revised Date: 29 January 2026
Accepted Date: 31 March 2026
Available Online: 1 April 2026

Figures(5)

Electroreduction of CO₂ to value-added products remained hindered by the lack of active sites within the catalytic materials and the hydrogen evolution side reaction. Inspired by the copper (Cu)-based bimetallic tandem catalytic mechanism, we designed an ultrafast electrodeposition technique and successfully obtained a series of CuAg and CuPd electrodes. The optimal CuAg-10 electrode demonstrated remarkable CO₂ electrocatalytic performance in a H-cell, achieving the Faradaic efficiency of methane (FE_CH₄) of 86.93% at −1.5 V (vs. RHE) in 0.1 mol/L KHCO₃. Meanwhile, the optimal CuPd-10 electrode exhibited excellent Faradaic efficiency for ethylene (FE_C₂H₄) of 67.10% at −1.4 V (vs. RHE) in 0.1 mol/L KI. Density functional theory (DFT) calculations revealed that Ag atoms facilitated the stabilization of the *CH₂O intermediate in the CO₂-to-CH₄ pathway, whereas Pd atoms promoted the asymmetric coupling of *CO and *CHO intermediates in CO₂-to-C₂H₄ process. This study furnished theoretical insights guiding the design of Cu-based bimetallic electrodes for the efficient electrochemical reduction of CO₂ to C₁ or C₂ products.
- Carbon dioxide,
- Electroreduction,
- Copper-based,
- Electrodeposition,
- Tandem electrode
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沈阳化工大学材料科学与工程学院沈阳 110142

Selective regulation of CO2 electroreduction via tandem reactions over copper-based bimetallic catalysts

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通讯作者: 陈斌, bchen63@163.com

Selective regulation of CO₂ electroreduction via tandem reactions over copper-based bimetallic catalysts