期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 19, 页码 10977-10982出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202102193
关键词
CO2 reduction reaction; electrochemistry; hierarchical structures; materials science; metal– polymer hybrids
资金
- National Key Research and Development Program of China [2017YFA0403102, 2020YFA0710200]
- National Natural Science Foundation of China [22022307, 21733011, 21773267, 21573073]
The study presents a novel method for synthesizing 3D hierarchical metal/polymer-carbon paper electrodes through in situ electrosynthesis, which can efficiently reduce CO2 to desired products depending on the metal used. The critical factors for the excellent performance are the 3D hierarchical structure of the metals and the in situ formation of the electrodes.
The design of catalysts with high activity, selectivity, and stability is key to the electroreduction of CO2. Herein, we report the synthesis of 3D hierarchical metal/polymer-carbon paper (M/polymer-CP) electrodes by in situ electrosynthesis. The 3D polymer layer on CP (polymer-CP) was first prepared by in situ electropolymerization, then a 3D metal layer was decorated on the polymer-CP to produce the M/polymer-CP electrode. Electrodes with different metals (e.g. Cu, Pd, Zn, Sn) and various polymers could be prepared by this method. The electrodes could efficiently reduce CO2 to desired products, such as C2H4, CO, and HCOOH, depending on the metal used. For example, C2H4 could be formed with a Faradaic efficiency of 59.4 % and a current density of 30.2 mA cm(-2) by using a very stable Cu/PANI-CP electrode in an H-type cell. Control experiments and theoretical calculations showed that the 3D hierarchical structure of the metals and in situ formation of the electrodes are critical for the excellent performance.
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