Preparation of integrated oxygen evolution electrode using array of titanium dioxide nanorods as carrier

The impregnation thermal decomposition method was successfully used to prepare IrO₂-TiO₂/C oxygen evolution electrode with chloro iridic acid as a precursor, carbon paper as support, the array of TiO2 nanorods as the carrier. Scanning electron microscopy (SEM), XRD, XPS and electrochemical methods——cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to study the effect of the morphology of the carrier on the performance of oxygen evolution electrode. The results show that the titanium dioxide carrier can effectively inhibit corrosion of the supporting body of carbon paper under high potential; integral charge of the integrated oxygen evolution electrode increases from 87.2 mC/cm² to 178.5 mC/cm², and electrochemical reaction resistance reduces from 3.13 Ω·cm² to 1.62 Ω·cm² when voltage is 2.4 V and polarization current is 13.2 mA/cm², which greatly improves the oxygen evolution electrode contact area and electrocatalytic activity.