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Issue 19, 2017
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Hierarchical porous Fe3O4/Co3S4 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

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Abstract

Transition-metal sulfides have attracted extensive interest as oxygen evolution reaction (OER) catalyst alternatives to noble metal based catalysts but generally exhibit limited electrocatalytic activity. We here report hierarchical porous Fe3O4/Co3S4 composite nanosheets for a highly efficient electrocatalytic OER in alkaline electrolytes. The preparation of the composite involves a hydrothermal synthesis and a subsequent sulfurization process. The prepared porous Fe3O4/Co3S4 composite shows strong synergetic coupling effects, facilitating active site exposure, and facile charge transfer. Remarkably, Fe3O4/Co3S4 nanosheets afforded an electrocatalytic OER with a current density of 10 mA cm−2 at a low potential of 1.50 V and a small Tafel slope of about 56 mV dec−1. This indicates that the composite of porous Fe3O4/Co3S4 nanosheets is promising as an efficient electrocatalyst for the OER that can be used in the fields of fuel cells, metal-air batteries and water splitting for hydrogen production.

Graphical abstract: Hierarchical porous Fe3O4/Co3S4 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

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Publication details

The article was received on 08 Mar 2017, accepted on 10 Apr 2017 and first published on 10 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA02108A
Citation: J. Mater. Chem. A, 2017,5, 9210-9216
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    Hierarchical porous Fe3O4/Co3S4 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

    J. Du, T. Zhang, J. Xing and C. Xu, J. Mater. Chem. A, 2017, 5, 9210
    DOI: 10.1039/C7TA02108A

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