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Special Issue:
SPECIAL TOPIC — Ion beam modification of materials and applications
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| 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)‡ |
| Department of Physics, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, China |
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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.
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Received: 27 May 2021
Revised: 04 July 2021
Accepted manuscript online: 12 July 2021
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PACS:
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61.80.-x
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(Physical radiation effects, radiation damage)
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61.72.U-
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(Doping and impurity implantation)
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88.30.em
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(Electrolytic hydrogen)
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63.20.dk
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(First-principles theory)
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| Fund: 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). |
Corresponding Authors:
Li Cheng, Xiangheng Xiao
E-mail: lcheng@whu.edu.cn;xxh@whu.edu.cn
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Cite this article:
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) Oxygen vacancies and V co-doped Co3O4 prepared by ion implantation boosts oxygen evolution catalysis 2021 Chin. Phys. B 30 106102
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