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Issue 27, 2012
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Mixed-solution synthesis of sea urchin-like NiSe nanofiber assemblies as economical Pt-free catalysts for electrochemical H2 production

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Abstract

Nickel (Ni)-based nanomaterials have been intensively explored as promising noble-metal-free hydrogen evolution reaction (HER) electrocatalysts. Here, we report that uniform sea urchin-like NiSe nanofiber assemblies can be prepared on a large scale by a ternary mixed solvent strategy. The new NiSe exhibits very high HER activity in 0.5 M H2SO4, comparable to the best performance of the well-studied MoS2 catalysts. The Tafel slope of ∼64 mV per decade was observed for the sea urchin-like NiSe catalyst, suggesting that the Volmer–Heyrovsky HER mechanism presumably takes effect in the HER. Although the stability of such a NiSe nanofiber assembled nanostructure needs to be further improved, this study addresses the benefits and possibilities of using Ni-based chalcogenides to design high performance and low cost HER catalysts.

Graphical abstract: Mixed-solution synthesis of sea urchin-like NiSe nanofiber assemblies as economical Pt-free catalysts for electrochemical H2 production

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Publication details

The article was received on 27 Mar 2012, accepted on 10 May 2012 and first published on 10 May 2012


Article type: Paper
DOI: 10.1039/C2JM31916K
J. Mater. Chem., 2012,22, 13662-13668

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    Mixed-solution synthesis of sea urchin-like NiSe nanofiber assemblies as economical Pt-free catalysts for electrochemical H2 production

    M. Gao, Z. Lin, T. Zhuang, J. Jiang, Y. Xu, Y. Zheng and S. Yu, J. Mater. Chem., 2012, 22, 13662
    DOI: 10.1039/C2JM31916K

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