Peer-reviewed veterinary case report
Nanostructured Fe-Doped Ni<sub>3</sub>S<sub>2</sub> Electrocatalyst for the Oxygen Evolution Reaction with High Stability at an Industrially-Relevant Current Density.
- Year:
- 2024
- Authors:
- Zhu J et al.
- Affiliation:
- Chemical Engineering Group Engineering and Technology Institute Groningen (ENTEG) · Netherlands
Abstract
A novel oxygen evolution reaction (OER) electrocatalyst was prepared by a synthesis strategy consisting of the solvothermal growth of Ni<sub>3</sub>S<sub>2</sub> nanostructures on Ni foam, followed by hydrothermal incorporation of Fe species (Fe-Ni<sub>3</sub>S<sub>2</sub>/Ni foam). This electrocatalyst displayed a low OER overpotential of 230 mV at 100 mA·cm<sup>-2</sup>, a low Tafel slope of 43 mV·dec<sup>-1</sup>, and constant performance at an industrially relevant current density (500 mA·cm<sup>-2</sup>) over 100 h in a 1.0 M KOH electrolyte, despite a minor loss of Fe in the process. Based on a detailed characterization by (in situ) Raman spectroscopy, (quasi-in situ) XPS, SEM, TEM, XRD, ICP-AES, EIS, and <i>C</i><sub>dl</sub> analysis, the high OER activity and stability of Fe-Ni<sub>3</sub>S<sub>2</sub>/Ni foam were attributed to the nanostructuring of the surface in the form of stable nanosheets and to the combination of Ni<sub>3</sub>S<sub>2</sub> granting suitable electrical conductivity with newly formed NiFe-based (oxy)hydroxides at the surface of the material providing the active sites for OER.
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Search related cases →Original publication: https://europepmc.org/article/MED/39404487