Chinese Journal of Catalysis ›› 2025, Vol. 69: 1-16.DOI: 10.1016/S1872-2067(24)60209-3

• Reviews •     Next Articles

Tandem design on electrocatalysts and reactors for electrochemical CO2 reduction

Mingzhi Wang, Wensheng Fang, Deyu Zhu, Chenfeng Xia, Wei Guo(), BaoYu Xia()   

  1. Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, Hubei, China
  • Received:2024-10-24 Accepted:2024-12-20 Online:2025-02-18 Published:2025-02-10
  • Contact: E-mail: wguo@hust.edu.cn (W. Guo), byxia@hust.edu.cn (B. Xia).
  • About author:Wei Guo is currently an associate professor in the School of Chemistry and Chemical Engineering at Huazhong University of Science and Technology (HUST), China. He obtained his B.S. in 2012 and Ph.D. degree in 2017 from HUST. Following the completion of his postdoctoral research at the University of Tennessee, Knoxville, and Oak Ridge National Laboratory (USA) in 2021, he joined the faculty at HUST. His research interests are in energy-efficient CO2 capture and conversion.
    Bao Yu Xia is currently a full professor in the School of Chemistry and Chemical Engineering at Huazhong University of Science and Technology (HUST), China. He received his Ph.D. degree in Materials Science and Engineering at Shanghai Jiao Tong University (SJTU) in 2010. He worked at Nanyang Technological University (NTU) from 2011 to 2016. He is Distinguished Young Scholars Recipients of National Natural Science Foundation of China (2024). His research interests are in energy chemistry and material science.
  • Supported by:
    National Key Research and Development Program of China(2021YFA1600800);National Key Research and Development Program of China(2021YFA1501000);National Natural Science Foundation of China(22105081);National Natural Science Foundation of China(22075092);National Natural Science Foundation of China(223B2901);National Science Foundation for Distinguished Young Scholars(22325901);Fundamental Research Funds for the Central Universities(YCJJ20242227)

Abstract:

Electrochemical CO2 reduction (ECR) driven by intermittent renewable energy sources is an emerging technology to achieve net-zero CO2 emissions. Tandem electrochemical CO2 reduction (T-ECR), employs tandem catalysts with synergistic or complementary functions to efficiently convert CO2 into multi-carbon (C2+) products in a succession of reactions within single or sequentially coupled reactors. However, the lack of clear interpretation and systematic understanding of T-ECR mechanisms has resulted in suboptimal current outcomes. This review presents new perspectives and summarizes recent advancements in efficient T-ECR across various scales, including synergistic tandem catalysis at the microscopic scale, relay tandem catalysis at the mesoscopic scale, and tandem reactors at the macroscopic scale. We begin by outlining the principle of tandem catalysis, followed by discuss on tandem catalyst design, the electrode construction, and reactor configuration. Additionally, we address the challenges and prospects of tandem strategies, emphasizing the integration of machine learning, theoretical calculations, and advanced characterization techniques for developing industry-scale CO2 valorization.

Key words: Electrochemical CO2 reduction, Multi-carbon product, Tandem design, Electrocatalyst, Reactors