In-situ reduced petal-like cobalt on Ni foam based cobaltosic oxide as an efficient catalyst for hydrogen peroxide electroreduction

摘要: Abstract Petal shaped Co/Co3O4 composite electrocatalyst with a special structure used as cathode for H2O2 electroreduction is obtained by route of hydrothermal synthesis and in-situ chemical reduction. The phase composition microstructure the are characterized X-ray diffraction (XRD), photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) transmission (TEM). Electrochemical performance on petals (Ps) explored cyclic voltammetry (CV), chronoamperometry (CA) electrochemical impedance spectrometry (EIS). Ps exhibits higher conductivity than single Co3O4, which leads to better catalytic activity stability toward electroreduction. In solution 3 mol L− 1 NaOH 0.5 mol L− 1 H2O2, current density 440 mA cm− 2 at − 0.8 V, that make an excellent alternative catalyst fuel cell.