Despite the huge progress that has been achieved in developing mixed metal oxides for remarkable and promising electrocatalysts towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), new cost-effective and non-toxic materials are much needed. A facile strategy was circumvented to embellish the callus 4e- transfer process of OER by achieving morphological enhancement and optimized electrical configuration. Herein, the different amount of iron (Fe) (2, 5, 10, and 12 at.%) was doped in manganese oxide (MnO2). Various characterization methods were subjected to study the phase, surface composition, chemical state, and structural improvement, using XRD, XPS, and SEM. Furthermore, experimental methods are employed to investigate a comprehensive understanding of the catalytic performance of the synthesized materials. Among all, Mn0.95Fe0.05O2 showed superior activity and endurance towards HER (79 mV of overpotential @ 10 mA/cm2 and Tafel slope of 182 mV/dec) and OER (278 mV of overpotential @ 10 mA/cm2 and Tafel slope of 44 mV/dec). It also exhibits impressive longevity over 24 h and the electrode material after a long run showed no further deterioration in electrochemical properties. Additionally, the aggrandized electrochemical active surface area corresponds to more active sites and produces H2 and O2 due to the significant roughness factor. Thus, Mn0.95Fe0.05O2 can serve as an effective bifunctional electrocatalyst for the water-splitting process.