FACILE SYNTHESIS OF Ni-Co-S ON Ni FOAM AS ELECTROCATALYST FOR OXYGEN EVOLUTION REACTION

DOI: 10.18173/2354-1059.2023-0028

Tóm tắt

Ni-Co-S electrocatalysts for oxygen evolution reaction (OER) are fabricated on nickel foam using a one-step hydrothermal method. The as-prepared materials were characterized using a scanning electron microscope (SEM), energydispersive X-ray spectroscopy (EDX), X-ray diffraction analysis (XRD), and cyclic voltammetry (CV). With the presence of Co, both the double-layer capacitance and the surface concentration of the redox active site increase, resulting in an improvement in OER catalytic activity in the basic medium. The sample prepared with the 1\1 ratio of Ni\Co shows the best electrocatalytic performance with the low overpotential of 276 mV at a current density of 10 mA cm-2 and a Tafel slope of 51.3 mV dec-1 and exhibits good stability in the OER.