Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (04): 831-836.doi: 10.3866/PKU.WHXB201202101

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Characterization of a Novel Bi-Doped PbO2 Electrode

YANG Wei-Hua, YANG Wu-Tao, LIN Xiao-Yan   

  1. College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, Fujian Province, P. R. China
  • Received:2012-01-03 Revised:2012-01-26 Published:2012-03-21
  • Contact: YANG Wei-Hua
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21103055) and Special Fund of Basic Scientific Research Business Expenses of Huaqiao University, China (JB-ZR1139).

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), fluorospectrophotometry (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 flat-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.

Key words: Bismuth, Lead dioxide, Bandgap, Flatband potential, Electro-catalytic activity


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