Hollow Metal-Organic-Framework-Mediated In Situ Architecture of Copper Dendrites for Enhanced CO2 Electroreduction

Qinggong Zhu; Dexin Yang; Huizhen Liu; Xiaofu Sun; Chunjun Chen; Jiahui Bi; Jiyuan Liu; Haihong Wu; Buxing Han

doi:10.1002/anie.202001216

Hollow Metal-Organic-Framework-Mediated In Situ Architecture of Copper Dendrites for Enhanced CO₂ Electroreduction

Angew Chem Int Ed Engl. 2020 Jun 2;59(23):8896-8901. doi: 10.1002/anie.202001216. Epub 2020 Apr 6.

Authors

Qinggong Zhu¹, Dexin Yang^{1

2}, Huizhen Liu^{1

3}, Xiaofu Sun^{1

3}, Chunjun Chen^{1

3}, Jiahui Bi^{1

3}, Jiyuan Liu^{1

3}, Haihong Wu⁴, Buxing Han^{1

3

4}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² College of Chemistry, Zhengzhou University, 100 Kexue Road, Zhengzhou, 450001, China.
³ University of Chinese Academy of Sciences, Beijing, 100049, China.
⁴ Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.

PMID: 32134166
DOI: 10.1002/anie.202001216

Abstract

Electrocatalytic reduction of CO₂ to a single product at high current densities and efficiencies remains a challenge. However, the conventional electrode preparation methods, such as drop-casting, usually suffer from low intrinsic activity. Herein, we report a synthesis strategy for preparing heterogeneous electrocatalyst composed of 3D hierarchical Cu dendrites that derived from an in situ electrosynthesized hollow copper metal-organic framework (MOF), for which the preparation of the Cu-MOF film took only 5 min. The synthesis strategy preferentially exposes active sites, which favor's the reduction of CO₂ to formate. The current density could be as high as 102.1 mA cm^-2 with a selectivity of 98.2 % in ionic-liquid-based electrolyte and a commonly used H-type cell.

Keywords: CO2; electroreduction; formate; ionic liquid; metal-organic frameworks (MOFs).

Abstract

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