二氧化铅电极的制备、表征及其电催化性能研究

Preparation,characterization and electro-catalytic properties investigation of lead dioxide electrode

以电沉积法制备了Ti/PbO2和Ti/MnO2/PbO22种电极。采用SEM、XRD和XPS等分析方法表征了电极的形貌、元素组成及元素化学态,并以罗丹明B为目标有机物,考察了所制备电极的析氧极化曲线和电催化活性以及Ti/MnO2/PbO2电极的循环伏安曲线。研究结果表明,Ti/MnO2/PbO2电极的稳定性、使用寿命、析氧电位和电催化活性较Ti/PbO2电极都有所提高,并且罗丹明B在Ti/MnO2/PbO2电极上的反应主要发生在析氧反应区,且反应不可逆。

Ti/PbO2 and Ti/MnO2/PbO2 electrodes were prepared by electro-deposition. The micrograph of the electrode surface, the element composition of different layers and the element chemical environment in the electrode surface were analyzed with the help of SEM, XRD and XPS. Polarization curves of oxygen evolution, electro-catalytic activity of prepared electrodes and cyclic voltammetry curve of Ti/MnO2/PbO2 electrode were also investigated using Rhodamine B as a model pollutant. Compared with Ti/PbO2 electrode, the Ti/MnOJPbO2 electrode has improved in the stability, service life, oxygen evolution potential and electro-catalytic activity. And the reaction of Rhodamine B in the Ti/MnO2/PbO2 electrode mainly occurs in the range of oxygen evolution reaction, and the reaction is irreversible.