Akademik Veri Yönetim Sistemi
FUEL, cilt.395, 2025 (SCI-Expanded, Scopus)
CO2 emissions from existing non-renewable energy sources pose serious environmental consequences, making it a major global concern. There is an urgent need to develop eco-friendly alternative energy resources. Efficient electrocatalysts represent a promising solution due to their zero emissions of CO2. In this study, we synthesized sustainable electrocatalysts based on transition metal oxides, designed to offer high current densities, superior stability, and a lower onset potential. Therefore, individual thin film electrodes of Fe3O4 and Mn3O4 and their binary composite MnFe2O4 were fabricated using an aerosol-assisted chemical vapor deposition (AACVD) method for water-splitting applications. Bimetallic thin film electrodes were developed by varying the deposition temperatures of 425, 450, 475, and 500 degrees C. The synthesized thin film electrodes underwent comprehensive characterization to evaluate their structure, properties, composition, and morphology using techniques such as Xray diffractometry (XRD), scanning electron microscopy (SEM), elemental mapping, and X-ray photoelectron spectroscopy (XPS). Among the tested electrodes, the MnFe2O4 binary thin film electrode synthesized at 500 degrees C showed promising results for the oxygen evolution reaction compared to individual thin films and other binary composites prepared at different temperatures. It exhibited the lowest charge transfer resistance (Rct) of 1.56 ohm and achieved current densities of 50 and 100 mA/cm2 at remarkably low overpotentials of 390 and 480 mV, respectively. Further, the MnFe2O4@500 possess electrochemical active area of 269.2 cm2 and Tafel slope value of 54 mV/dec. Moreover, following electrochemical efficiency, the film fabricated at 500 degrees C has the highest ND value of 8.12 x 1020 with the lowest flat band potential of 0.96 V. In addition, the same film showed excellent durability of 15 h at the potential of 1.35 V analyzed by chronoamperometry.