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Hierarchical Fe-Doped Ni3Se4 Ultrathin Nanosheets as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Abstract

Developing highly efficient oxygen evolution reaction (OER) electrocatalysts is critical to the cost-effective generation of clean fuels. Transition-metal selenides have been proposed to be OER catalyst alternatives to noble metal based catalysts but generally exhibit limited electrocatalytic activity. We here report hierarchical Fe-doped Ni3Se4 ((Ni,Fe)3Se4) ultrathin nanosheets as an efficient electrocatalyst for OER in alkaline electrolytes. The preparation involves a solvothermal synthesis and a topotactic conversion process. The prepared hierarchical (Ni,Fe)3Se4 ultrathin nanosheets show abundant and accessible catalytic active sites, facile charge transfer and the high specific surface area. Relative to the Ni3Se4 nanosheets, the as-prepared (Ni,Fe)3Se4 ultrathin nanosheets show a higher current density and a lower Tafel slope towards OER. Remarkably, hierarchical (Ni,Fe)3Se4 ultrathin nanosheets supported on Ni foam exhibit an electrocatalytic OER with a current density of 10 mA cm-2 at a low overpotential of 225 mV and a small Tafel slope of about 41 mV dec-1. This study establishes (Ni,Fe)3Se4 ultrathin nanosheet as an efficient electrocatalyst for the OER that can be used in the fields of metal-air batteries and water splitting for hydrogen production.

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Publication details

The article was accepted on 04 Feb 2018 and first published on 06 Feb 2018


Article type: Paper
DOI: 10.1039/C8NR00426A
Citation: Nanoscale, 2018, Accepted Manuscript
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    Hierarchical Fe-Doped Ni3Se4 Ultrathin Nanosheets as an Efficient Electrocatalyst for Oxygen Evolution Reaction

    J. Du, Z. Zou, C. Liu and C. Xu, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00426A

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