▎ 摘　　要

Given the growing need for renewable energy and related technologies, researches have shifted to develop lowcost, stable, high-efficiency electrocatalysts in clean energy generation reactions such as water electrolysis. In the present paper, a three-dimensional Fe2TiO5/nitrogen-doped graphene (3D FTO/NG) nanocomposite is prepared using a simple, cheap and fast method, called chemical bath deposition (CBD). Structural and physical characterizations of the prepared electrocatalysts are performed by different methods such as Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive X-ray spectroscopy (EDX), Fourier Transform InfraRed spectra (FT-IR), Dynamic Light Scattering (DLS), X-ray Diffraction (XRD), Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS). The fabricated binder-free 3D FTO/NG, 3D NG and 3D G on nickel foam (NF) electrodes, were applied to study oxygen evolution reaction (OER) in alkaline medium. Among these electrodes, the 3D FTO/NG electrocatalyst, has an overpotential of 264.15 mV at 10 mA cm-2 and its Tafel slope was 35 (mV/dec). Its long-term stability and excellent performance are due to the simultaneous effect of nitrogen doping and presence of metal oxide nanoparticles, which helped to increase the number of active sites for reaction, adsorption of hydroxide ions and electrode conductivity.