One step preparation of Fe doped CoSe2 supported on nickel foam by facile electrodeposition method as a highly efficient oxygen evolution reaction electrocatalyst

Abstract

The production of hydrogen by water electrolysis fundamentally requires growth of strong and effective oxygen evolutional electrocatalysts. Transition metal selenides, comprising of earth abundant elements have attracted regards as superb electrocatalysts for oxygen evolution reaction (OER) in the alkaline electrolyte. Toward defeat the huge overpotential for OER, in this manuscript we investigate the expansion of Fe doped cobalt-diselenide (Fe-CoSe2) nanostructure over 3D nickel foam (NF) through a simple and scalable electrodeposition technique. The prepared Fe-CoSe2/NF electrode demands an overpotential of only 220 and 256 mV to attain the current density of 10 and 100 mA cm−2, respectively. Moreover, the Fe-CoSe2/NF exhibits negligible tafel slope (35.6 mV dec−1) and good stability.