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FeNi₂S₄ : A Potent Bifunctional Efficient Electrocatalyst for the Overall Electrochemical Water Splitting in Alkaline Electrolyte

Title data

Hegazy, Mohamed Barakat Zakaria ; Zander, Judith ; Weiß, Morten ; Simon, Christopher ; Gerschel, Philipp ; Sanden, Sebastian A. ; Smialkowski, Mathias ; Tetzlaff, David ; Kull, Tobias ; Marschall, Roland ; Apfel, Ulf-Peter:
FeNi₂S₄ : A Potent Bifunctional Efficient Electrocatalyst for the Overall Electrochemical Water Splitting in Alkaline Electrolyte.
In: Small. (11 March 2024) . - 2311627.
ISSN 1613-6829
DOI: https://doi.org/10.1002/smll.202311627

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft
Graduate school of the Bavarian Centre for Battery Technology (BayBatt) of the University of Bayreuth

Abstract in another language

For a carbon-neutral society, the production of hydrogen as a clean fuel through water electrolysis is currently of great interest. Since water electrolysis is a laborious energetic reaction, it requires high energy to maintain efficient and sustainable production of hydrogen. Catalytic electrodes can reduce the required energy and minimize production costs. In this context, herein, a bifunctional electrocatalyst made from iron nickel sulfide (FeNi2S4 [FNS]) for the overall electrochemical water splitting is introduced. Compared to Fe2NiO4 (FNO), FNS shows a significantly improved performance toward both OER and HER in alkaline electrolytes. At the same time, the FNS electrode exhibits high activity toward the overall electrochemical water splitting, achieving a current density of 10 mA cm?2 at 1.63 V, which is favourable compared to previously published nonprecious electrocatalysts for overall water splitting. The long-term chronopotentiometry test reveals an activation followed by a subsequent stable overall cell potential at around 2.12 V for 20 h at 100 mA cm?2.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: electrocatalytic activity; spinel bimetallic sulfides; stability; surface; water electrolysis
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 27 Mar 2024 06:38
Last Modified: 27 Mar 2024 06:38
URI: https://eref.uni-bayreuth.de/id/eprint/89049