Volume 14, Issue 50 1803666
Full Paper

In Situ Fabrication of Heterostructure on Nickel Foam with Tuned Composition for Enhancing Water-Splitting Performance

Xuerong Zheng

Xuerong Zheng

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072 China

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Yiqi Zhang

Yiqi Zhang

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

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Hui Liu

Hui Liu

School of Materials Science and Engineering, Engineering Laboratory of Functional Optoelectronic Crystalline Materials of Hebei Province, Hebei University of Technology, Tianjin, 300132 P. R. China

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Dongju Fu

Dongju Fu

Research Institute of Tsinghua University in Shenzhen, Guangdong, 518057 China

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Jianjun Chen

Jianjun Chen

Research Institute of Tsinghua University in Shenzhen, Guangdong, 518057 China

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Jihui Wang

Jihui Wang

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

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Cheng Zhong

Cheng Zhong

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072 China

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Yida Deng

Yida Deng

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

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Xiaopeng Han

Corresponding Author

Xiaopeng Han

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072 China

Research Institute of Tsinghua University in Shenzhen, Guangdong, 518057 China

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071 China

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Wenbin Hu

Wenbin Hu

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072 China

Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072 China

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First published: 11 October 2018
Citations: 124

Abstract

Exploiting economical and high-performance bifunctional electrocatalysts toward hydrogen and oxygen evolution reactions (HER/OER) is at the heart of overall water splitting in large-scale application. Herein, an in situ and stepwise strategy for synthesizing core–shell Ni3(S1−xSex)2@NiOOH (0 ≤ x ≤ 1) nanoarray heterostructures on nickel foam with tailored compositions for enhancing water-splitting performance is reported. A series of Ni3(S1−xSex)2 nanostructures is firstly grown on nickel foam via an in situ reaction in a heated polyol solution system. Ni3(S1−xSex)2@NiOOH nanocomposites are subsequently prepared via electrochemical oxidation and the oxidation degree is systematically investigated by varying the oxidation time. Benefitting from the vertical standing architecture, abundant exposed active sites, and synergetically interfacial enhancement, Ni3(S0.25Se0.75)2@NiOOH heterojunctions with electrochemical polarization for 8 h exhibit superior HER and OER behaviors, achieving a water-splitting current density of 10 mA cm−2 at a small overpotential of 320 mV as well as boosted reaction kinetics and long-term stability. This work should shed light on the controllable synthesis of metal-based hybrid materials and provide a promising direction for developing the highest-performing electrocatalysts based on interfacial and heterostructural regulation for advanced electrochemical energy conversion technologies.

Conflict of Interest

The authors declare no conflict of interest.

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