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Mo, Co co-doped NiS bulks supported on Ni foam as an efficient electrocatalyst for overall water splitting in alkaline media

Abstract

In this work, Mo, Co co-doped NiS bulks grown on Ni foam (Mo,Co-NiS/NF) was synthesized as a bi-functional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) using a simple method. The existence of ZIF-67 and Mo could make sure the evenly distribution of Co and Mo element and the formation of N doped carbon layer in Mo,Co-NiS/NF. Mo, Co co-doping and NF-supporting greatly improved the electrocatalytic performance of NiS bulks because metal element doping could improve the intrinsic activity and electrical conductivity, meanwhile, Ni foam could act as a substrate to avoid aggregation and provide nickel source to form bimetallic sulfide. The product Mo,Co-NiS/NF-400 showed outstanding electrchemical property with ultralow overpotential (92 mV vs. RHE) for HER and ultralow overpotential (81 mV vs. RHE) for OER to achieve 10 mA cm-2 and the ultralow cell voltage (1.36 V) to achieve 20 mA cm-2 for overall water splitting. This work provided an available method to promote the electrocatalytic activity of traditional monometallic sulfides for overall water splitting.

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Publication details

The article was received on 19 Sep 2019, accepted on 04 Nov 2019 and first published on 04 Nov 2019


Article type: Paper
DOI: 10.1039/C9SE00822E
Sustainable Energy Fuels, 2019, Accepted Manuscript

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    Mo, Co co-doped NiS bulks supported on Ni foam as an efficient electrocatalyst for overall water splitting in alkaline media

    C. Wu, Y. Du, Y. Fu, D. Feng, H. Li, Z. Xiao, Y. Liu, Y. Yu and L. Wang, Sustainable Energy Fuels, 2019, Accepted Manuscript , DOI: 10.1039/C9SE00822E

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