[NiFe]-(Oxy)Sulfides Derived from NiFe 2 O 4 for the Alkaline Hydrogen Evolution Reaction

David Tetzlaff, Vasanth Alagarasan, Christopher Simon, Daniel Siegmund, Kai junge Puring, Roland Marschall and Ulf-Peter Apfel
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David Tetzlaff: Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, 46047 Oberhausen, Germany
Vasanth Alagarasan: Inorganic Chemistry I, Ruhr University Bochum, 44780 Bochum, Germany
Christopher Simon: Physical Chemistry III, University of Bayreuth, 95447 Bayreuth, Germany
Daniel Siegmund: Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, 46047 Oberhausen, Germany
Kai junge Puring: Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, 46047 Oberhausen, Germany
Roland Marschall: Physical Chemistry III, University of Bayreuth, 95447 Bayreuth, Germany
Ulf-Peter Apfel: Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, 46047 Oberhausen, Germany

Energies, 2022, vol. 15, issue 2, 1-9

Abstract: The development of noble-metal-free electrocatalysts is regarded as a key factor for realizing industrial-scale hydrogen production powered by renewable energy sources. Inspired by nature, which uses Fe- and Ni-containing enzymes for efficient hydrogen generation, Fe/Ni-containing chalcogenides, such as oxides and sulfides, received increasing attention as promising electrocatalysts to produce hydrogen. We herein present a novel synthetic procedure for mixed Fe/Ni (oxy)sulfide materials by the controlled (partial) sulfidation of NiFe 2 O 4 (NFO) nanoparticles in H 2 S-containing atmospheres. The variation in H 2 S concentration and the temperature allows for a precise control of stoichiometry and phase composition. The obtained sulfidized materials (NFS) catalyze the hydrogen evolution reaction (HER) with increased activity in comparison to NFO, up to −10 and −100 mA cm −2 at an overpotential of approx. 250 and 450 mV, respectively.

Keywords: hydrogen; oxysulfide; electrocatalysis; alkaline hydrogen evolution reaction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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