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Research Article

Self-templating synthesis and structural regulation of nanoporous rhodium-nickel alloy nanowires efficiently catalyzing hydrogen evolution reaction in both acidic and alkaline electrolytes

Zhihua Zhai1, Yan Wang2( ), Conghui Si3, Pan Liu4, Wanfeng Yang1, Guanhua Cheng1, Zhonghua Zhang1( )
Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China
School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Shandong Provincial Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics, School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Graphical Abstract

A self-templating strategy was proposed to synthesize one-dimensional nanoporous RhNi alloy nanowires, which show excellent electrocatalytic activity and stability towards hydrogen evolution reaction in both acidic and alkaline media.

Abstract

Highly active and stable electrocatalysts to produce hydrogen through water splitting are crucial for clean energy systems but are still challenging. Herein, a novel self-templating strategy was proposed to synthesize one-dimensional nanoporous RhNi alloy nanowires through combining metallurgical eutectic solidification and microalloying with chemical dealloying. In-situ X-ray diffraction and ex-situ characterizations reveal that the Al matrix served as a template to guide the growth of the Al3(Ni, Rh) nanowires during eutectic solidification of Al-Ni-Rh precursor and was completely removed in the dealloying process. Meanwhile, the nanowire morphology could be well retained and the dealloying of Al3(Ni, Rh) led to the formation of nanoporous RhNi alloy nanowires. The length scale of the RhNi nanowires could be facilely regulated by changing the solidification conditions. More importantly, the RhNi catalysts show excellent electrocatalytic activity and stability towards hydrogen evolution reaction in both acidic and alkaline media, which has been rationalized by density functional theory calculations.

Keywords

nanoporous alloysnanowireshydrogen evolution reactiondensity functional theorydealloying

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Nano Research
Volume 16 Issue 2,
February 2023
Pages 2026-2034
DOI: 10.1007/s12274-022-4861-x
Cite this article:
Zhai Z, Wang Y, Si C, et al. Self-templating synthesis and structural regulation of nanoporous rhodium-nickel alloy nanowires efficiently catalyzing hydrogen evolution reaction in both acidic and alkaline electrolytes. Nano Research, 2023, 16(2): 2026-2034. https://doi.org/10.1007/s12274-022-4861-x
Topics:
Hydrogen evolution reaction

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Received: 14 April 2022
Revised: 29 July 2022
Accepted: 03 August 2022
Published: 12 September 2022
© Tsinghua University Press 2022
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