物理化学学报2012，Vol.28Issue(4)：831-836,6.DOI:10.3866/PKU.WHXB201202101
高性能Bi3+掺杂改性PbO2电极的制备及表征
Preparation and Characterization of a Novel Bi-Doped PbO2 Electrode
摘要
Abstract
A novel high-performance PbO2 electrode modified with Bi3+ (Bi-PbO2) was prepared by electrodeposition.The microstructure and electrochemical properties of the modified electrode were investigated using scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDS),X-ray photoelectron spectroscopy (XPS),X-ray diffraction (XRD),UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS),fiuorospectrophotometry (FP),Mott-Schottky analysis,electrochemical impedance spectroscopy (EIS),and linear-sweep voltammetry (LSV).The results of SEM,EDS,XPS,XRD,and UV-Vis DRS show that insertion of Bi3+,which is in the form of Bi2O3,into the PbO2 film can reduce its particle size,change its crystal cell parameters,and narrow its bandgap (Eg).FP analysis reveals that the electrocatalytic activity of the Bi-PbO2 electrode in the degradation of organic materials is higher than that of the PbO2 electrode because more hydroxyl radicals can be generated on its surface.Electrochemical performance tests show that the modified electrode has a more negative fiat-band potential (Efb),larger active surface area,lower charge-transfer resistance,and higher oxygen-evolution potential; these characteristics promote the electrocatalytic activity of the Bi-PbO2 electrode in the decomposition of organic materials.关键词
铋/二氧化铅/禁带宽度/平带电势/电催化活性Key words
Bismuth/Lead dioxide/Bandgap/Flatband potential/Electro-catalytic activity分类
化学化工引用本文复制引用
杨卫华,杨武涛,林小燕..高性能Bi3+掺杂改性PbO2电极的制备及表征[J].物理化学学报,2012,28(4):831-836,6.基金项目
国家自然科学基金(21103055)和华侨大学基本科研业务专项基金(JB-ZR1139)资助项目 （21103055）
