Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 47, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212329
Keywords
CO2 Electroreduction; Diatomic Site Catalysts; Industrial Current Density; Synergistic Effect
Categories
Funding
- China Ministry of Science and Technology [2020YFA0710200]
- Anhui Provincial Natural Science Foundation [2108085QB70, 2108085UD06, 2022a05020053]
- Collaborative Innovation Program of Hefei Science Center, CAS [2021HSC-CIP002]
- National Natural Science Foundation of China [22209122]
- Natural Science Foundation of Zhejiang Province [LY20B010004]
- Fundamental Research Funds for the Central Universities [WK2060000004, KY2060000180, KY2060000195]
- China Postdoctoral Science Foundation [2021M703069, 2021M702279, 2021TQ0216]
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The CoCu DASC exhibits excellent selectivity and high current density, showing potential as a catalyst for industrial electrochemical CO2 reduction.
Single atom catalysts (SACs) have been widely studied in the field of CO2 electroreduction, but industrial-level current density and near-unity product selectivity are still difficult to achieve. Herein, a diatomic site catalysts (DASCs) consisting of Co-Cu hetero-diatomic pairs is synthesized. The CoCu DASC exhibits excellent selectivity with the maximum CO Faradaic efficiency of 99.1 %. The CO selectivity can maintain above 95 % over a wide current density range from 100 mA cm(-2) to 500 mA cm(-2). The maximum CO partial current density can reach to 483 mA cm(-2) in flow cell, far exceed industrial-level current density requirements (>200 mA cm(-2)). Theoretical calculation reveals that the synergistic catalysis of the Co-Cu bimetallic sites reduce the activation energy and promote the formation of intermediate *COOH. This work shows that the introduction of another metal atom into SACs can significantly affect the electronic structure and then enhance the catalytic activity of SACs.
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