超声对Ti/SnO2+Sb2O3/PbO2电极材料结构及电极性能的影响

用SEM和XRD技术测定和分析了不同超声波作用时间下Ti／SnO2 Sb2O3／PbO2电极材料的表面形貌和结构，应用循环伏安法研究了超声波作用时间对Ti／SnO2 Sb2O3／PbO2电极在1．0mol／LH2SO4溶液中的伏安特性的影响．实验结果表明：超声波作用于电极材料会对电极表面的形貌和结构产生影响；电极经超声处理20min后，其循环伏安峰电流与未经超声波作用时相比增加了近1倍；电极的电化学活性表面积随超声波作用时间的延长呈先增大后减小的趋势，在本实验中超声波作用时间为20min时，伏安电荷最大，即活性表面积最大.

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.