An MoS2/NiCo2O4 composite supported on Ni foam as a bifunctional electrocatalyst for efficient overall water splitting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number109842
Journal / PublicationJournal of Physics and Chemistry of Solids
Volume150
Online published27 Oct 2020
Publication statusPublished - Mar 2021

Abstract

Fabricating highly efficient and low-cost non-precious metal-based catalysts is a prerequisite for large-scale electrochemical water splitting in future renewable energy systems, yet remains a challenge. Herein, we describe the synthesis of cobalt-nickel oxide nanowires decorated with molybdenum disulfide nanosheets, directly grown on Ni foam (MoS2/NiCo2O4/NF), by a simple stepwise hydrothermal method and calcination process. Benefiting from a synergistic effect between MoS2 and NiCo2O4, the heterostructured catalyst accelerates water dissociation and exhibits superior catalytic activity under alkaline conditions, with a current density of 50 mA cm−2 at a low overpotential of 322 mV for the oxygen evolution reaction (OER) and an overpotential of 106 mV for the hydrogen evolution reaction (HER) (@ j = 10 mA cm−2). Notably, when used as both anode and cathode for overall water splitting, MoS2/NiCo2O4/NF achieved a quite low voltage of 1.62 V at 10 mA cm−2, and exhibited satisfactory stability for 16 h. Moreover, we have achieved continuous hydrogen and oxygen evolution at 1.606 V generated by using a solar panel, which is a promising route for solar-to-hydrogen conversion.

Research Area(s)

  • MoS2/NiCo2O4, Solar-to-hydrogen conversion, Synergistic effect, Water splitting

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