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Hollow Metal–Organic‐Framework‐Mediated In Situ Architecture of Copper Dendrites for Enhanced CO 2 Electroreduction
Author(s) -
Zhu Qinggong,
Yang Dexin,
Liu Huizhen,
Sun Xiaofu,
Chen Chunjun,
Bi Jiahui,
Liu Jiyuan,
Wu Haihong,
Han Buxing
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202001216
Subject(s) - formate , electrocatalyst , copper , electrolyte , metal organic framework , materials science , ionic liquid , current density , chemical engineering , electrode , in situ , selectivity , inorganic chemistry , nanotechnology , chemistry , electrochemistry , catalysis , organic chemistry , metallurgy , adsorption , physics , quantum mechanics , engineering
Electrocatalytic reduction of CO 2 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 CO 2 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.