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Effect of Carbon Nanotube and Graphene Oxide on the Electrocatalytic Behavior of Ni-W Alloy for Hydrogen Evolution Reaction

Abstract

The present work reports a relative account of the electrocatalytic activity of the composite coatings of Ni-W developed using carbon nanotube (CNT) and graphene oxide (GO). Ni-W-CNT and Ni-W-GO coatings were developed by exploiting the advantage of composite electrodeposition technique. The effect of CNT and GO on the induced codeposition behavior of the reluctant metal W and the relation with their electrocatalytic efficiency was studied. The electrocatalytic alkaline water splitting efficiency for hydrogen evolution reaction (HER) of the electrode materials was tested by using cyclic voltammetry (CV) and chronopotentiometry (CP) techniques. Further, the practical utility of the electrode materials was evaluated by quantifying the amount of H2 gas evolved. The variation in electrocatalytic activity with composition, structure, and morphology of the coatings was examined systematically using XRD, SEM, and EDS analyses. Drastic improvement in the electrocatalytic activity for HER was found in both Ni-W-CNT and Ni-W-GO composite coatings, compared to as-coated Ni-W alloy. The obtained results showed Ni-W-CNT composite coating as the best electrode material for alkaline HER, attributed by both increased W content and number of electroactive centres, affected by the homogeneous distribution of CNT in the alloy matrix.

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Publication details

The article was received on 25 Jul 2017, accepted on 10 Oct 2017 and first published on 11 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02722B
Citation: New J. Chem., 2017, Accepted Manuscript
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    Effect of Carbon Nanotube and Graphene Oxide on the Electrocatalytic Behavior of Ni-W Alloy for Hydrogen Evolution Reaction

    L. Elias and A. C. Hegde, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02722B

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