Issue 19, 2017

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

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

Supplementary files

Article information

Article type
Paper
Submitted
08 Mar 2017
Accepted
10 Apr 2017
First published
10 Apr 2017

J. Mater. Chem. A, 2017,5, 9210-9216

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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