Nanostructured Fe-Ni Sulfide : A Multifunctional Material for Energy Generation and Storage

Chen Zhao, Chunyang Zhang, Sanket Bhoyate, Pawan K. Kahol, Nikolaos Kostoglou, Christian Mitterer, Steven J. Hinder, Mark Baker, Georgios Constantinides, Kyriaki Polychronopoulou, Claus Rebholz, Ram K. Gupta

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9 Citations (Scopus)


Multifunctional materials for energy conversion and storage could act as a key solution for growing energy needs. In this study, we synthesized nanoflower-shaped iron-nickel sulfide (FeNiS) over a nickel foam (NF) substrate using a facile hydrothermal method. The FeNiS electrode showed a high catalytic performance with a low overpotential value of 246 mV for the oxygen evolution reaction (OER) to achieve a current density of 10 mA/cm 2, while it required 208 mV at 10 mA/cm 2 for the hydrogen evolution reaction (HER). The synthesized electrode exhibited a durable performance of up to 2000 cycles in stability and bending tests. The electrolyzer showed a lower cell potential requirement for a FeNiS-Pt/C system (1.54 V) compared to a standard benchmark IrO 2-Pt/C system (1.56 V) to achieve a current density of 10 mA/cm 2 . Furthermore, the FeNiS electrode demonstrated promising charge storage capabilities with a high areal capacitance of 13.2 F/cm 2 . Our results suggest that FeNiS could be used for multifunctional energy applications such as energy generation (OER and HER) and storage (supercapacitor).

Original languageEnglish
Article number597
Number of pages12
JournalCatalysts : open access journal
Issue number7
Publication statusPublished - 11 Jul 2019

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