<p>This work investigates the influence of varying lithium (Li) ion concentrations in magnesium ferrite (MgFe₂O₄) on the OER. Li_xMg_(1-x)Fe₂O₄ materials were synthesized using the solid-state reaction method, and their structural, morphological, and water-splitting behaviours were explored. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirmed the cubic structure and elemental composition of the materials, respectively. The crystallite size increased from 37.65 to 60.35 nm, and the X-ray density decreased from 5.53 to 5.42 g/cm³ as the molar concentration of lithium ions increased in magnesium ferrite. Fourier transform infrared spectroscopy (FTIR) confirmed the presence of functional groups in the materials. Scanning electron microscopy (SEM) revealed agglomerated nanocrystals of varying sizes on the material’s surface. The magnetic properties of the soft magnetic material is studied by Vibrating sample magnetometer (VSM). The particle size and shape were observed by transmission electron microscopy (TEM). Thin films of the synthesized powder were prepared using the doctor blade method for electrochemical characterization. Electrochemical analysis showed that the synthesized material exhibited an overpotential of 391 mV at a current density of 10 mA/cm² for the OER. These findings highlight the tuneable electrocatalytic properties of Li_xMg_(1-x)Fe₂O₄ and its potential for applications in renewable energy conversion technologies.</p> Graphical Abstract <p>Graphical representation of LiMgFe₂O₄ for efficient OER</p> <p></p>