Effects of ultrasound on the microstructure and electrochemical behavior of Ti/SnO2+Sb2O3/PbO2 electrodes

The morphology and microstructure of the electrodes under ultrasound were observed and analyzed by means of ESEM and XRD. The effects of ultrasonic irradiation time on the electrochemical active surface of the Ti/SnO2+Sb2O3/PbO2 electrodes in 1.0mol/L H2SO4 solutions were studied by cyclic voltammetry. The experimental results show that the ultrasound has the influence on the morphology and microstructure of the electrodes surfaces. Under ultrasound for 20min, the cyclic voltammetric peak current density is about two times as high as that of the anode without ultrasonic irradiation. The voltammetric charge of the electrodes increases firstly as the time under ultrasound increases, after ultrasonic irradiation 20min, and the voltammetric charge decreases with increasing ultrasonic irradiation time. The voltammetric charge is the highest under the condition of ultrasonic irradiation for 20min, which means that the electrochemical active surface of the electrodes is the largest at the ultrasonic irradiation time.