Abstract
IrOx electrodes were fabricated by cyclic thermal heating and water quenching (H&Q) process and high-temperature carbonate oxidation, respectively. By examining the E-pH relationship, response rate, potential drift behavior of the fabricated electrodes, the electrodes prepared by H&Q process seemed to show better comprehensive performance. Characterization tests such as scanning electron microscopy (SEM), X-ray photoelectron spectrum (XPS), electrochemical impedance spectrum (EIS), etc. were used to characterize the fabricated IrOx electrodes and find out the reason for the better performance of the electrodes prepared by the H&Q process. Morphology tests show that the H&Q electrode shows a relative multi-layer structure, which could provide a larger surface area for the H+ response process. At the meantime, combining the XPS and EIS test etc., more effective response composition, smaller response reaction of surface IrOx film could account for the better performance of the IrOx electrode.