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<p>Nano-ferrites have recently emerged as potential candidates for application in energy storage devices due to their good redox activity, excellent chemical stability and tunable electronic properties. In this study, we report the synthesis of pristine Mn<sub>0.5</sub>Co<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> (MCF) nanoparticles and their nanocomposite with reduced graphene oxide (rGO) via facile chemical co-precipitation method. In this configuration, MCF provides pseudocapacitance and structural stability while rGO contributes a large surface area and high electrical conductivity. Structural morphological analysis confirmed the formation of spinel phase of ferrites having nanoscale features. Electrochemical performance was assessed via cyclic voltammetry (CV) in three-electrode system with 1&#xa0;M KOH as the electrolyte. Specific capacitance at each scan was higher for composite material. The rGO-MCF nanocomposite exhibited remarkably enhanced specific capacitance of 1228.7&#xa0;F/g at 2 mV/s, compared to 448&#xa0;F/g for the pristine MCF. Electrochemical impedance spectroscopy (EIS) revealed lower Charge transfer resistance for nanocomposite (36.8 Ω) than pristine MCF (59.0 Ω) which may be attributed to the high conductive nature of rGO. Moreover, the rGO-MCF composite sample exhibited superior oxygen evolution reaction (OER) activity with a lower overpotential and a Tafel slope of 78 mV/dec along with excellent cyclic stability. These findings suggest that rGO-MCF nanocomposite is a promising candidate for electrodes of supercapacitors and OER applications.</p> Graphical Abstract <p></p>

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Synthesis and Electrochemical Evaluation of rGO-Mn₀.₅Co₀.₅Fe₂O₄ Nanocomposite: A Dual-Functional Electrode with Better Capacitance and Oxygen Evaluation Activity

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Arslan Bashir,
  • Nasima Arshad,
  • Furqan Ijaz,
  • Ameer Ali,
  • Muhammad Shahroz,
  • Neha Ali,
  • Ejaz Muhammad,
  • Tariq Jan

摘要

Nano-ferrites have recently emerged as potential candidates for application in energy storage devices due to their good redox activity, excellent chemical stability and tunable electronic properties. In this study, we report the synthesis of pristine Mn0.5Co0.5Fe2O4 (MCF) nanoparticles and their nanocomposite with reduced graphene oxide (rGO) via facile chemical co-precipitation method. In this configuration, MCF provides pseudocapacitance and structural stability while rGO contributes a large surface area and high electrical conductivity. Structural morphological analysis confirmed the formation of spinel phase of ferrites having nanoscale features. Electrochemical performance was assessed via cyclic voltammetry (CV) in three-electrode system with 1 M KOH as the electrolyte. Specific capacitance at each scan was higher for composite material. The rGO-MCF nanocomposite exhibited remarkably enhanced specific capacitance of 1228.7 F/g at 2 mV/s, compared to 448 F/g for the pristine MCF. Electrochemical impedance spectroscopy (EIS) revealed lower Charge transfer resistance for nanocomposite (36.8 Ω) than pristine MCF (59.0 Ω) which may be attributed to the high conductive nature of rGO. Moreover, the rGO-MCF composite sample exhibited superior oxygen evolution reaction (OER) activity with a lower overpotential and a Tafel slope of 78 mV/dec along with excellent cyclic stability. These findings suggest that rGO-MCF nanocomposite is a promising candidate for electrodes of supercapacitors and OER applications.

Graphical Abstract