Electrochemically prepared Fe: NiO thin film catalysis for oxygen evolution reaction

The electrocatalysis-based nickel oxide (NiO) films and doped with various amount of iron were synthesized on stainless steel (SS) substrate by electrodeposition. X-ray diffraction analysis (XRD) and filed effect scanning electron microscopy (FE-SEM) utilized to investigate structural and morphological properties. The X-ray diffraction analysis polycrystalline cubic structure has confirmed. Surface morphology study revealed the grains are regularly scattered over the total surface of the substrates after doping. The oxygen evolution reaction (OER) properties of doped films more efficient than that of pure thin films. The 4% Fe:NiO films exhibited an over potential of 320 mV at 10 mA cm−2 current density and a Tafel slope of 89.80 mV dec−1. The electrode shows the high durability over 5 h with small degradation.