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Phase-controlled synthesis and the phase-dependent HER and OER performances of Nickel selenide nanosheets by an electrochemical deposition route

Abstract

Phase-controlled synthesis of nickel selenide nanostructures was successfully realized via a facile electrodeposition route from the same electrolyte at room temperature, employing Ni foam (NF) as the substrate, NiCl2 and SeO2 as the Ni and Se sources. Experiments uncovered that pure NiSe2, NiSe and Ni3Se2 were separately obtained when the deposition potentials were -0.35, -0.46 and -0.60 V in turn. The as-obtained products were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). It was found that nickel selenide nanostructures exhibited obvious phase-dependent electrocatalytic activities for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). NiSe2 presented the best HER and OER performances. The NiSe2/NF electrode only required the overpotential of 104 mV to drive the current density of 10 mA cm-2 for HER and 279 mV to drive the current density of 20 mA cm-2 for OER, respectively. Moreover, three nickel selenides/NF electrodes displayed excellent catalytic stability.

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Publication details

The article was received on 11 Mar 2018, accepted on 12 May 2018 and first published on 14 May 2018


Article type: Paper
DOI: 10.1039/C8CE00381E
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Phase-controlled synthesis and the phase-dependent HER and OER performances of Nickel selenide nanosheets by an electrochemical deposition route

    J. Zhu and Y. Ni, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00381E

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