Ion Irradiation Inducing Oxygen Vacancy-Rich NiO/NiFe2O4 Heterostructure for Enhanced Electrocatalytic Water Splitting
Huizhou Zhong
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuoping Gao
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA
Search for more papers by this authorXuening Wang
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorHengyi Wu
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorShaohua Shen
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049 China
Search for more papers by this authorWenbin Zuo
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuangxu Cai
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuo Wei
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorYing Shi
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorDejun Fu
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorChangzhong Jiang
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorLin-Wang Wang
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA
Search for more papers by this authorCorresponding Author
Feng Ren
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
E-mail: [email protected]
Search for more papers by this authorHuizhou Zhong
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuoping Gao
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA
Search for more papers by this authorXuening Wang
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorHengyi Wu
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorShaohua Shen
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049 China
Search for more papers by this authorWenbin Zuo
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuangxu Cai
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorGuo Wei
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorYing Shi
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorDejun Fu
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorChangzhong Jiang
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
Search for more papers by this authorLin-Wang Wang
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA
Search for more papers by this authorCorresponding Author
Feng Ren
School of Physics and Technology, Center for Ion Beam Application, Center for Electron Microscopy, Hubei Key Laboratory of Nuclear Solid Physics and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan, 430072 China
E-mail: [email protected]
Search for more papers by this authorAbstract
Oxygen evolution reaction (OER) is an obstacle to the electrocatalytic water splitting due to its unique four-proton-and-electron-transfer reaction process. Many methods, such as engineering heterostructure and introducing oxygen vacancy, have been used to improve the catalytic performance of electrocatalysts for OER. Herein, the above two kinds of regulation are simultaneously realized in a catalyst by using unique ion irradiation technology. A nanosheet structured NiO/NiFe2O4 heterostructure with rich oxygen vacancies converted from nickel–iron layered double hydroxides by Ar+ ions irradiation shows significant enhancement in both OER and hydrogen evolution reaction performance. Density functional theory (DFT) calculations reveal that the construction of NiO/NiFe2O4 can optimize the free energy of O* to OOH* process during OER reaction. The oxygen vacancy-rich NiO/NiFe2O4 nanosheets have an overpotential of 279 mV at 10 mA cm−2 and a low Tafel slope of 42 mV dec−1. Moreover, this NiO/NiFe2O4 electrode shows an excellent long-term stability at 100 mA cm−2 for 450 h. The synergetic effects between NiO and NiFe2O4 make NiO/NiFe2O4 heterostructure have high conductivity and fast charge transfer, abundant active sites, and high catalytic reactivity, contributing to its excellent performance.
Conflict of Interest
The authors declare no conflict of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Supporting Information
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Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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