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Self-supported porous WN nanowires array: an efficient 3D electrocatalyst in the hydrogen evolution reaction

Abstract

Development of non-noble metal electrocatalysts for hydrogen evolution reaction (HER) has attracted much attention. Metal-nitrides are considered as promising alternatives in recent years. Nevertheless, the preparation of tungsten nitride still suffer from environmentally unfriendly source and poor morphology, which induces the relative low activity. Herein we employed clean N2-plasma to develop 3D WN nanowires array on carbon cloth (WN NW/CC) with a porous structure. As expected, the resulting WN NW/CC are highly active, giving a small η10 (overpotential to drive a current of 10 mA cm-2) of 134 mV, and Tafel slope of 59.6 mV dec-1 in acid solution, and η10 of 130 mV, and Tafel slope of 57.1 mV dec-1 in alkaline solution, respectively. Additionally, it maintains its catalytic activity for at least 14500 s in both acidic and alkaline media.

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Publication details

The article was received on 06 Jun 2017, accepted on 10 Aug 2017 and first published on 10 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA04923D
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Self-supported porous WN nanowires array: an efficient 3D electrocatalyst in the hydrogen evolution reaction

    B. ren, D. li, Q. jin, H. cui and C. Wang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04923D

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