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Review Article | Open Access

Tandem electrocatalysts for CO2 reduction to prepare multi-carbon products

Zaiming Chen1,§, Xuewei Song1,§, Tao Long1, Yugang Yan2, Fei Lv3, Jing Ma3, Shengpan Peng3, Zhengwei Tong3, Fangkun Fan4, Rongfei Yu5, Dafeng Yan5 ( ), Shenghua Chen4 ( )
CHN Energy Zhejiang Ninghai Power Generation Co. Ltd, Ningbo 315612, China
CHN Energy Zhejiang Electric Power Co. Ltd, Hangzhou 310020, China
Nation Institute of Clean-and-Low-Carbon Energy, CHN Energy, Beijing 102209, China
National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China

§ Zaiming Chen and Xuewei Song contributed equally to this work.

Show Author Information

Graphical Abstract

This review summarizes recent progress in tandem electrocatalysts for CO2 reduction to prepare C2+ products, including Cu–metal, Cu–metal–N–C, Cu–metal–organic framework, and Cu-free tandem materials.

Abstract

Electrocatalytic CO2 reduction reaction (CRR) is considered as a sustainable approach to converting CO2 into high value-added chemicals, assisting the goal of carbon peaking and carbon neutrality. Electrochemical CRR can be easily regulated by controlling the electrocatalyst, electrolyte, and reactor to produce various chemicals. Among different products, multi-carbon (C2+) products draw widespread attention for their high energy density and value along with complex reaction mechanisms. It is well recognized that *CO intermediate plays vital role in forming C2+ products and Cu is the only metal catalyst which can efficiently electro-reduce CO2 to C2+ products. Therefore, researchers developed many strategies to increase the amount of *CO intermediate and further enhance the performance of C2+ products. Recently, designing tandem electrocatalysts consisted of Cu and the materials which can convert CO2 to *CO intermediate has become a hotspot and achieved great achievements. In this review, we will summary the recent progress in tandem electrocatalysts for CO2 reduction to prepare C2+ products, including the origin and fundamental mechanism of tandem electrocatalysis, the strategies of catalyst design, and regulation principles. In addition, some newest findings, like Cu tandem catalysts can achieve to produce C2+ products, are well introduced. Finally, the remaining challenges and prospects for future development are also proposed.

Keywords

electrocatalytic CO2 reductiontandem electrocatalysismulti-carbon productselectrocatalyst

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Nano Research
Volume 18 Issue 4,
April 2025
Article number: 94907270
DOI: 10.26599/NR.2025.94907270
Cite this article:
Chen Z, Song X, Long T, et al. Tandem electrocatalysts for CO2 reduction to prepare multi-carbon products. Nano Research, 2025, 18(4): 94907270. https://doi.org/10.26599/NR.2025.94907270
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Received: 16 December 2024
Revised: 14 January 2025
Accepted: 22 January 2025
Published: 11 March 2025
© The Author(s) 2025. Published by Tsinghua University Press.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/).
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