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Facile synthesis of electrocatalytically active NbS2 nanoflakes for an enhanced hydrogen evolution reaction (HER)

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Abstract

We report a simple ambient pressure annealing technique for the synthesis of ultrathin niobium disulfide (NbS2) nanoflakes. The structure, morphology and composition of the as-synthesized NbS2 flakes are well characterized using various microscopic and spectroscopic techniques. The synthesized two-dimensional layered NbS2 is in stoichiometric proportion, and has a single crystal 3R-NbS2 polymorph structure with semiconducting behavior and has abundant catalytic defect sites. In this paper, the hydrogen evolution reaction (HER) activity of the NbS2 nanoflakes/rGO composite having dense exposed basal planes with improved conductivity is explored, and it is found to be a good HER catalyst in terms of low onset potential, low Tafel slope and high exchange current density.

Graphical abstract: Facile synthesis of electrocatalytically active NbS2 nanoflakes for an enhanced hydrogen evolution reaction (HER)

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Publication details

The article was received on 04 Aug 2017, accepted on 04 Nov 2017 and first published on 06 Nov 2017


Article type: Communication
DOI: 10.1039/C7SE00376E
Citation: Sustainable Energy Fuels, 2018, Advance Article
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    Facile synthesis of electrocatalytically active NbS2 nanoflakes for an enhanced hydrogen evolution reaction (HER)

    D. Gopalakrishnan, A. Lee, N. K. Thangavel and L. M. Reddy Arava, Sustainable Energy Fuels, 2018, Advance Article , DOI: 10.1039/C7SE00376E

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