Interlaced NiS2–MoS2 nanoflake-nanowires as efficient hydrogen evolution electrocatalysts in basic solutions

Tiance An; Yang Wang; Jing Tang; Wei Wei; Xiaoqi Cui; Abdullah M. Alenizi; Lijuan Zhang; Gengfeng Zheng

doi:10.1039/C6TA05022K

Interlaced NiS₂–MoS₂ nanoflake-nanowires as efficient hydrogen evolution electrocatalysts in basic solutions†

Tiance An,‡^a Yang Wang,‡^a Jing Tang,^a Wei Wei,^a Xiaoqi Cui,^a Abdullah M. Alenizi,^b Lijuan Zhang*^a and Gengfeng Zheng*^a

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* Corresponding authors

^a Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
E-mail: gfzheng@fudan.edu.cn, zhanglijuan@fudan.edu.cn

^b Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia

Abstract

The electrocatalytic activity of transition metal sulfides is strongly correlated with the active edge sites and conductivity of the catalysts. Here we developed a hybrid nanowire structure consisting of NiS₂–MoS₂ interlaced nanoflakes by the thermal conversion of nickel molybdate (NiMoO₄) nanowire precursors. The obtained NiS₂–MoS₂ interlaced nanoflakes have sub-200 nm sizes with abundant active edge sites and defects, as well as synergistic nanoscale interfaces between NiS₂ and MoS₂ throughout the whole structure. The hetero-nanowires exhibit superior hydrogen evolution reaction (HER) catalytic activity including a low onset potential of 76 mV and a small Tafel slope of 70 mV dec⁻¹ in a 1 M KOH aqueous solution, which substantially exceeds those of most of the metal sulfide HER catalysts including individual NiS₂ and MoS₂ nanostructures in basic solutions.

This article is part of the themed collection: 2016 Journal of Materials Chemistry A HOT Papers

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Article information

DOI: https://doi.org/10.1039/C6TA05022K
Article type: Paper
Submitted: 15 Jun 2016
Accepted: 20 Jul 2016
First published: 20 Jul 2016

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J. Mater. Chem. A, 2016,4, 13439-13443

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Interlaced NiS₂–MoS₂ nanoflake-nanowires as efficient hydrogen evolution electrocatalysts in basic solutions

T. An, Y. Wang, J. Tang, W. Wei, X. Cui, A. M. Alenizi, L. Zhang and G. Zheng, J. Mater. Chem. A, 2016, 4, 13439 DOI: 10.1039/C6TA05022K

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Journal of Materials Chemistry A