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Issue 16, 2017
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Supercritical fluid processing for the synthesis of NiS2 nanostructures as efficient electrocatalysts for electrochemical oxygen evolution reactions

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Abstract

In this work, the synthesis of NiS2 nanostructures using a simple and one-step environmentally benign supercritical fluid processing technique within 60 min of reaction time has been demonstrated. Structural and morphological characterization has been performed to confirm that the as-synthesized products are cubic NiS2 nanostructures. Interestingly, the as-prepared NiS2 nanostructures exhibit superior electrocatalytic activity towards the oxygen evolution reaction with a small overpotential of 264 mV vs. RHE at 10 mA cm−2 and a Tafel slope of 105 mV dec−1. Remarkably, the observed catalytic activity of the NiS2 nanostructures bears close resemblance to that of the benchmark IrO2 catalyst, where IrO2 shows an overpotential of 260 mV with a Tafel slope of 95 mV dec−1. Thus, the as-synthesized NiS2 nanostructures can be considered as a promising material for the replacement of noble metal-based IrO2 catalysts.

Graphical abstract: Supercritical fluid processing for the synthesis of NiS2 nanostructures as efficient electrocatalysts for electrochemical oxygen evolution reactions

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Publication details

The article was received on 02 Jun 2017, accepted on 24 Jul 2017 and first published on 25 Jul 2017


Article type: Paper
DOI: 10.1039/C7CY01103B
Citation: Catal. Sci. Technol., 2017,7, 3591-3597
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    Supercritical fluid processing for the synthesis of NiS2 nanostructures as efficient electrocatalysts for electrochemical oxygen evolution reactions

    P. Thangasamy, V. Maruthapandian, V. Saraswathy and M. Sathish, Catal. Sci. Technol., 2017, 7, 3591
    DOI: 10.1039/C7CY01103B

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