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Bromine and nitrogen co-doped tungsten nanoarrays to enable hydrogen evolution at all pH values

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Abstract

Introducing bromine and nitrogen into metallic tungsten nanoarrays produces a W/BrN electrocatalyst with high performance for the hydrogen evolution reaction (HER) at all pH ranges. Unlike the acid soluble metals (such as Fe, Co, Ni), the resultant W/BrN has successfully inherited the excellent corrosion resistance from pure metallic W, particularly in proton exchange membrane compatible acid electrolytes. However, more importantly, the W/BrN develops some outstanding electrochemical properties, such as enhanced electrical conductivity, optimized electronic properties, and large turnover frequency (TOF), after codoping with Br and N. Hence, the HER performance of W/BrN was higher by several orders of magnitude in current density than that of pure metallic W. To attain current density of 10 mA cm−2, the W/BrN only needs overpotentials of 148, 190 and 94 mV in acidic, neutral and alkaline conditions, respectively. In addition, we investigated the long-term stability of W/BrN in three electrolytes.

Graphical abstract: Bromine and nitrogen co-doped tungsten nanoarrays to enable hydrogen evolution at all pH values

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Publication details

The article was received on 14 Jun 2017, accepted on 28 Jul 2017 and first published on 28 Jul 2017


Article type: Communication
DOI: 10.1039/C7TA05188C
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Bromine and nitrogen co-doped tungsten nanoarrays to enable hydrogen evolution at all pH values

    Q. Li, C. Han, X. Ma, D. Wang, Z. Xing and X. Yang, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA05188C

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