https://doi.org/10.1140/epjp/s13360-024-05868-8
Regular Article
Improvement in electrochemical performance of MnFeO3 using Nb-doping strategy for oxygen evolution reaction
1
Department of Physical Sciences, Chemistry Division, College of Science, Jazan University, P.O. Box 2097, 45142, Jazan, Saudi Arabia
2
Department of Chemistry, Government Graduate College Taunsa Sharif, 32100, Taunsa Sharif, Pakistan
Received:
18
July
2024
Accepted:
20
November
2024
Published online:
13
December
2024
The depletion of energy reserves and environmental complications, such as global warming give rise to make eco-friendly electrocatalysts indispensable for producing renewable energy. Concerning the advancement of electrocatalysts, doping is an effective technique for providing exceptional electrochemical characteristics for renewable energy generating processes like water splitting. The present work involves the synthesis of Nb-doped MnFeO3 electrocatalyst through the sol–gel phenomenon. The developed electrocatalysts were analyzed by various physiochemical methods like X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for finding purity, elemental composition and morphology of prepared electrocatalysts. The interfacial surface area (SA) of Nb-doped MnFeO3 electrocatalyst from BET analysis was 50 m2/g. Furthermore, the fabricated Nb-doped MnFeO3 electrocatalyst showed efficient OER activity in a 1 M KOH medium by displaying a decreased overpotential (221 mV) with low Tafel plot (37 mV/dec) at 10 mA/cm2. Nb-doped MnFeO3 electrocatalyst performed significantly better in OER activity than MnFeO3. Improved electrocatalytic outcomes can be achieved by obtaining experimental results on active sites and higher conductivity using electrochemical impedance spectroscopy (EIS) that shows Nb-doped MnFeO3 electrocatalyst revealed low charge transfer resistance (Rct = 0.10 Ω) which increases active sites for OER. This improved and superior performance of Nb-doped MnFeO3 electrocatalyst can be ascribed to factors like its robust OH− adsorption and strong synergistic effects. This Nb doping improved the electrocatalytic efficiency of the MnFeO3 electrocatalyst and hence it can be used for future energy production applications.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
