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In situ coupling of N-doped lignin-derived carbon-encapsulated CoFe-CoxN heterojunction for oxygen evolution reaction
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  • Xuliang Lin,
  • Jianglin Liu,
  • Linjun Wu,
  • Liheng Chen,
  • Yi Qi,
  • Zhongjie Qiu,
  • Huafeng Dong,
  • Yanlin Qin,
  • Xueqing Qiu
Xuliang Lin
Guangdong University of Technology

Corresponding Author:[email protected]

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Jianglin Liu
Guangdong University of Technology
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Linjun Wu
Guangdong University of Technology
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Liheng Chen
Guangdong University of Technology
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Yi Qi
Guangdong University of Technology
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Zhongjie Qiu
Guangdong University of Technology
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Huafeng Dong
Guangdong University of Technology
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Yanlin Qin
Guangdong University of Technology
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Xueqing Qiu
Guangdong University of Technology
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Abstract

Exploring highly active and stable electrocatalyst for oxygen evolution reaction is important for the development of water splitting and rechargeable metal-air batteries. Herein, a hybrid electrocatalyst of CoFe alloy and CoxN heterojunction encapsulated and embedded in N-doped carbon support (CoFe-CoxN@NC) was in situ coupling via a pyrolysis process of a novel coordination polymer from lignin biomacromolecule. CoFe-CoxN@NC exhibited an excellent OER activity with a low overpotential of 270 mV at 10 mA•cm−2 and stability with increment of 20 mV, comparable to commercial Ir/C. DFT calculations revealed that CoxN and N-doped grapheme encapsulation can reduce the binding strength between *O and CoFe alloy, prevent metals leaching and agglomeration, and improve electron transfer efficiency, thereby, remarkably enhancing the OER activity and stability. In situ coupling strategy of alloy and nitride heterojunction on N-doped lignin-derived carbon provided a promising and universal catalyst design for the development of renewable energy conversion technologies.
17 Feb 2022Submitted to AIChE Journal
18 Feb 2022Submission Checks Completed
18 Feb 2022Assigned to Editor
20 Feb 2022Reviewer(s) Assigned
06 Apr 2022Editorial Decision: Revise Major
29 Apr 20221st Revision Received
06 May 2022Submission Checks Completed
06 May 2022Assigned to Editor
24 May 2022Editorial Decision: Accept