中国物理B ›› 2021, Vol. 30 ›› Issue (10): 106102-106102.doi: 10.1088/1674-1056/ac1339

所属专题: SPECIAL TOPIC — Ion beam modification of materials and applications

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Oxygen vacancies and V co-doped Co3O4 prepared by ion implantation boosts oxygen evolution catalysis

Bo Sun(孙博), Dong He(贺栋), Hongbo Wang(王宏博), Jiangchao Liu(刘江超), Zunjian Ke(柯尊健), Li Cheng(程莉), and Xiangheng Xiao(肖湘衡)   

  1. Department of Physics, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, China
  • 收稿日期:2021-05-27 修回日期:2021-07-04 接受日期:2021-07-12 发布日期:2021-09-30
  • 通讯作者: Li Cheng, Xiangheng Xiao E-mail:lcheng@whu.edu.cn;xxh@whu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12025503, U1867215, and U1932134), Hubei Provincial Natural Science Foundation (Grant No. 2019CFA036), the Fundamental Research Funds for the Central Universities, China (Grant No. 2042020kf0211), and China Postdoctoral Science Foundation (Grant No. 2020M682429).

Oxygen vacancies and V co-doped Co3O4 prepared by ion implantation boosts oxygen evolution catalysis

Bo Sun(孙博), Dong He(贺栋), Hongbo Wang(王宏博), Jiangchao Liu(刘江超), Zunjian Ke(柯尊健), Li Cheng(程莉), and Xiangheng Xiao(肖湘衡)   

  1. Department of Physics, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, China
  • Received:2021-05-27 Revised:2021-07-04 Accepted:2021-07-12 Published:2021-09-30
  • Contact: Li Cheng, Xiangheng Xiao E-mail:lcheng@whu.edu.cn;xxh@whu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12025503, U1867215, and U1932134), Hubei Provincial Natural Science Foundation (Grant No. 2019CFA036), the Fundamental Research Funds for the Central Universities, China (Grant No. 2042020kf0211), and China Postdoctoral Science Foundation (Grant No. 2020M682429).

摘要: Introducing heteroatoms and defects is a significant strategy to improve oxygen evolution reaction (OER) performance of electrocatalysts. However, the synergistic interaction of the heteroatom and defect still needs further investigations. Herein, we demonstrated an oxygen vacancy-rich vanadium-doped Co3O4 (V-Ov-Co3O4), fabricated by V-ion implantation, could be used for high-efficient OER catalysis. X-ray photoelectron spectra (XPS) and density functional theory (DFT) calculations show that the charge density of Co atom increased, and the reaction barrier of reaction pathway from O* to HOO* decreased. V-Ov-Co3O4 catalyst shows a low overpotential of 329 mV to maintain current density of 10 mA·cm-2, and a small Tafel slope of 74.5 mV·dec-1. This modification provides us with valuable perception for future design of heteroatom-doped and defect-based electrocatalysts.

关键词: ion implantation, oxygen vacancy, oxygen evolution reaction, heteroatom doping

Abstract: Introducing heteroatoms and defects is a significant strategy to improve oxygen evolution reaction (OER) performance of electrocatalysts. However, the synergistic interaction of the heteroatom and defect still needs further investigations. Herein, we demonstrated an oxygen vacancy-rich vanadium-doped Co3O4 (V-Ov-Co3O4), fabricated by V-ion implantation, could be used for high-efficient OER catalysis. X-ray photoelectron spectra (XPS) and density functional theory (DFT) calculations show that the charge density of Co atom increased, and the reaction barrier of reaction pathway from O* to HOO* decreased. V-Ov-Co3O4 catalyst shows a low overpotential of 329 mV to maintain current density of 10 mA·cm-2, and a small Tafel slope of 74.5 mV·dec-1. This modification provides us with valuable perception for future design of heteroatom-doped and defect-based electrocatalysts.

Key words: ion implantation, oxygen vacancy, oxygen evolution reaction, heteroatom doping

中图分类号:  (Physical radiation effects, radiation damage)

  • 61.80.-x
61.72.U- (Doping and impurity implantation) 88.30.em (Electrolytic hydrogen) 63.20.dk (First-principles theory)