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Facile Design of Oxide-Derived Cu Nanosheet Electrocatalyst for CO2 Reduction Reaction
  • +6
  • Juhee Jang,
  • Shangqian Zhu,
  • Ernest Delmo,
  • Tiehuai Li,
  • Qinglan Zhao,
  • Yinuo Wang,
  • Lili Zhang,
  • Jingjie Ge,
  • Minhua Shao
Juhee Jang
Hong Kong University of Science and Technology School of Engineering
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Shangqian Zhu
Hong Kong University of Science and Technology School of Engineering
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Ernest Delmo
Hong Kong University of Science and Technology School of Engineering
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Tiehuai Li
Hong Kong University of Science and Technology School of Engineering
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Qinglan Zhao
Hong Kong University of Science and Technology School of Engineering
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Yinuo Wang
Hong Kong University of Science and Technology School of Engineering
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Lili Zhang
Huaiyin Normal University Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials
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Jingjie Ge
Hong Kong University of Science and Technology School of Engineering
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Minhua Shao
Hong Kong University of Science and Technology School of Engineering

Corresponding Author:kemshao@ust.hk

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Abstract

Despite of superior performance of the oxide-derived copper (OD-Cu) in producing valuable hydrocarbons during CO2RR, its fabrication process is still ambiguous and complicated. In this work, we develop a simple microwave-assisted method to synthesize the oxide-derived Cu nanosheet (OD-Cu NS) and reveal that the oxidation state of Cu species is controlled by varying the Cu precursor amount. Notably, the simultaneous formation of nano-sized Cu domains influence the surface roughness of OD-Cu NS. The partially oxidized Cu surface exhibits a superior faradaic efficiency (FE) of C2+ products up to 72%, along with a partial current density of 55 mA cm−2 in a neutral KHCO3 solution. More importantly, the as-obtained OD-Cu NS shows a synergetic effect on dissociating of CO2 molecules by the strong binding energy and promoting of C2+ compounds productivity by the enlarged electrochemical surface area. This work provides a new insight for designing efficient OD-Cu catalysts towards CO2RR.
20 Dec 2022Submitted to EcoMat
21 Dec 2022Submission Checks Completed
21 Dec 2022Assigned to Editor
21 Dec 2022Review(s) Completed, Editorial Evaluation Pending
21 Dec 2022Reviewer(s) Assigned
08 Jan 2023Editorial Decision: Revise Major
06 Feb 20231st Revision Received
07 Feb 2023Submission Checks Completed
07 Feb 2023Assigned to Editor
07 Feb 2023Review(s) Completed, Editorial Evaluation Pending
07 Feb 2023Editorial Decision: Accept