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Ternary nickel-iron sulfide microflower as a robust electrocatalyst for bifunctional water splitting

Abstract

The development of low-cost, highly efficient, and stable electrocatalysts toward overall water splitting (both the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER)) is essential for the future energy supply. In this report, 3D ternary nickel iron sulfide microflower with hierarchically porous structure directly grown on Ni foam via a facile two-step method has been fabricated, and further used as efficient electrocatalyst for both HER and OER. Thanks to the unique 3D morphology and strong electron interactions between Fe, Ni and S, the as-synthesized Ni0.7Fe0.3S2 delivers overpotential of 198 mV at current density of 10 mA cm-2 toward OER in alkaline media, which is, to the best of our knowledge, the best among the reported non-noble metal based electrocatalysts. Furthermore, when used as both anode and cathode, a low cell voltage of 1.625 V is needed to obtain 10 mA cm-2 for the overall water splitting.

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Publication details

The article was received on 22 May 2017, accepted on 11 Jul 2017 and first published on 11 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA04438K
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Ternary nickel-iron sulfide microflower as a robust electrocatalyst for bifunctional water splitting

    W. luo, J. Yu and G. Cheng, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04438K

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