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Vol. 12 (2020)

A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities

https://doi.org/10.1007/s40820-020-00442-0
Jiaxin Yuan
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Xiaodi Cheng
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Hanqing Wang
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Chaojun Lei
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Sameer Pardiwala
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Bin Yang
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Zhongjian Li
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Qinghua Zhang
Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Lecheng Lei
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Shaobin Wang
School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
Yang Hou
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China

Corresponding Author: Yang Hou

yhou@zju.edu.cn

Nano-Micro Letters, Vol. 12 (2020), Article Number: 104

Abstract

Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction (OER) are critical to the energy crisis and environmental pollution. Herein, we report a superaerophobic three dimensional (3D) heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy (NiSe2/NiFe2Se4@NiFe) prepared by a thermal selenization procedure. In this unique 3D heterostructure, numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~ 100 nm are grown on NiFe alloy in a uniform manner. Profiting by the large active surface area and high electronic conductivity, the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media, outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm−2, respectively, which is among the most active Ni/Fe-based selenides, and even superior to the benchmark Ir/C catalyst. The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER.


Highlights:


1 A superaerophobic heterostructured nanowrinkles of bimetallic selenides is developed.
2 The 3D heterostructure exhibits excellent activity and stability towards oxygen evolution reaction (OER) in base.

Keywords

Superaerophobicity Bimetallic selenide Heterostructure electrocatalyst Strong interfacial coupling Oxygen evolution reaction
Yuan, Jiaxin, Xiaodi Cheng, Hanqing Wang, Chaojun Lei, Sameer Pardiwala, Bin Yang, Zhongjian Li, Qinghua Zhang, Lecheng Lei, Shaobin Wang, and Yang Hou. 2020. “A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities”. Nano-Micro Letters 12 (May):104. https://doi.org/10.1007/s40820-020-00442-0.
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