SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 43 ›› Issue (3): 143-151.DOI: 10.1016/j.cjche.2021.10.013

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Cadmium-based metal-organic frameworks for high-performance electrochemical CO2 reduction to CO over wide potential range

Xin Li1, Song Hong2, Leiduan Hao1, Zhenyu Sun1   

  1. 1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    2. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-06-30 Revised:2021-09-12 Online:2022-04-28 Published:2022-03-28
  • Contact: Zhenyu Sun,E-mail:sunzy@mail.buct.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No. 21972010); Beijing Natural Science Foundation (No. 2192039); Beijing University of Chemical Technology (XK180301), and the Foundation of Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences (No. KLLCCSE-201901, SARI, CAS).

Cadmium-based metal-organic frameworks for high-performance electrochemical CO2 reduction to CO over wide potential range

Xin Li1, Song Hong2, Leiduan Hao1, Zhenyu Sun1   

  1. 1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    2. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Zhenyu Sun,E-mail:sunzy@mail.buct.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (No. 21972010); Beijing Natural Science Foundation (No. 2192039); Beijing University of Chemical Technology (XK180301), and the Foundation of Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences (No. KLLCCSE-201901, SARI, CAS).

Abstract: Electrochemical CO2 reduction (ECR) powered by renewable energy sources provides a sustainable avenue to producing carbon–neutral fuels and chemicals. The design and development of high performance, cost-effective, and stable catalysts for ECR remain a focus of intense research. Here, we report a novel electrocatalyst, two-dimensional cadmium-based 1,4-benzenedicarboxylate metal–organic frameworks (Cd-BDC MOFs) which can effectively convert CO2 to CO with a faradaic efficiency (FE) of more than 80.0% over the voltage range between -0.9 and -1.1 V (versus reversible hydrogen electrode, vs. RHE) in 0.1 mol·L-1 CO2-saturated KHCO3 solution with an H-type cell, reaching up to 88.9% at -1.0 V (vs. RHE). The performance outperforms commercial CdO and many other MOF-based materials demonstrated in prior literature. The catalytic property can be readily tuned by manipulating synthesis conditions as well as electrolyte type. Especially, high CO FEs exceeding 90.0% can be attained on the Cd-BDC electrode at potentials ranging from -0.16 to -1.06 V (vs. RHE) in 0.5 mol·L-1 KHCO3 solution by using a gas diffusion electrode cell system. The maximum CO FE approaches ~97.6% at -0.26 V (vs. RHE) and the CO partial geometric current density is as high as about 108.1 mA cm-2 at -1.1 V (vs. RHE). This work offers an efficient, low cost, and alternative electrocatalyst for CO2 transformation.

Key words: Electrochemical carbon dioxide reduction, Carbon monoxide, Cadmium, Metal-organic framework, Electrocatalysis

摘要: Electrochemical CO2 reduction (ECR) powered by renewable energy sources provides a sustainable avenue to producing carbon–neutral fuels and chemicals. The design and development of high performance, cost-effective, and stable catalysts for ECR remain a focus of intense research. Here, we report a novel electrocatalyst, two-dimensional cadmium-based 1,4-benzenedicarboxylate metal–organic frameworks (Cd-BDC MOFs) which can effectively convert CO2 to CO with a faradaic efficiency (FE) of more than 80.0% over the voltage range between -0.9 and -1.1 V (versus reversible hydrogen electrode, vs. RHE) in 0.1 mol·L-1 CO2-saturated KHCO3 solution with an H-type cell, reaching up to 88.9% at -1.0 V (vs. RHE). The performance outperforms commercial CdO and many other MOF-based materials demonstrated in prior literature. The catalytic property can be readily tuned by manipulating synthesis conditions as well as electrolyte type. Especially, high CO FEs exceeding 90.0% can be attained on the Cd-BDC electrode at potentials ranging from -0.16 to -1.06 V (vs. RHE) in 0.5 mol·L-1 KHCO3 solution by using a gas diffusion electrode cell system. The maximum CO FE approaches ~97.6% at -0.26 V (vs. RHE) and the CO partial geometric current density is as high as about 108.1 mA cm-2 at -1.1 V (vs. RHE). This work offers an efficient, low cost, and alternative electrocatalyst for CO2 transformation.

关键词: Electrochemical carbon dioxide reduction, Carbon monoxide, Cadmium, Metal-organic framework, Electrocatalysis