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Research Article

Heterointerface engineering of Ni/Ni3N hierarchical nanoarrays for efficient alkaline hydrogen evolution

Zhengbing Qi1, Ye Zeng2, Zhuo Hou1, Weijie Zhu2, Binbin Wei1,3( ), Yong Yang1, Bilan Lin1, Hanfeng Liang2( )
Key Laboratory of Functional Materials and Applications of Fujian Province, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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Graphical Abstract

Heterointerface engineering of Ni/Ni3N hierarchical nanoarrays via a one-step magnetron sputtering method could optimize the electronic structure and accelerate the electrocatalytic hydrogen evolution reaction (HER) kinetics in alkaline solution, thus significantly improving the HER performance.

Abstract

Ni-based transition metal nitrides (TMNs) have been regarded as promising substitutes for noble-metal electrocatalysts towards the hydrogen evolution reaction (HER) due to their low cost, excellent chemical stability, high electronic conductivity, and unique electronic structure. However, facile green synthesis and rational microstructure design of Ni-based TMNs electrocatalysts with high HER activity remain challenging. In this work, we report the fabrication of Ni/Ni3N heterostructure nanoarrays on carbon paper via a one-step magnetron sputtering method under low temperature and N2 atmosphere. The Ni/Ni3N hierarchical nanoarrays exhibit an excellent HER catalytic activity with a low overpotential of 37 mV at 10 mA·cm−2 and robust long-term durability over 100 h. Furthermore, the Ni/Ni3N||NiFeOH (NiFeOH = NiFe bimetallic hydroxide) electrolyzer requires a small voltage of 1.54 V to obtain 10 mA·cm−2 for water electrolysis. Density functional theory (DFT) calculations reveal that the heterointerface between Ni and Ni3N could directly induce electron redistribution to optimize the electronic structure, which accelerates the dissociation of water molecules and the subsequent hydrogen desorption, and thus boosting the HER kinetics.

Keywords

heterointerface engineeringtransition metal nitrideselectrocatalysthydrogen evolution reactionmagnetron sputtering

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Nano Research
Volume 16 Issue 4,
April 2023
Pages 4803-4811
DOI: 10.1007/s12274-022-5339-6
Cite this article:
Qi Z, Zeng Y, Hou Z, et al. Heterointerface engineering of Ni/Ni3N hierarchical nanoarrays for efficient alkaline hydrogen evolution. Nano Research, 2023, 16(4): 4803-4811. https://doi.org/10.1007/s12274-022-5339-6
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Received: 18 October 2022
Revised: 16 November 2022
Accepted: 17 November 2022
Published: 23 December 2022
© Tsinghua University Press 2022
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