Preparation of ZrO₂-Doped Nb/PbO₂ Electrode and Electrocatalytic Performance of Methyl Orange Degradation

Authors

Li ZHANG, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
Wen-yan DONG, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
Tai-lai YANG, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
Zhen-hai LIANG, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Follow

Corresponding Author

Zhen-hai LIANG(liangzhenhai@tyut.edu.cn)

Abstract

The zirconium oxide (ZrO₂)-doped niobium based lead oxide (Nb/PbO₂) electrode was prepared by electrodeposition. The microstructures and electrochemical properties of Nb/ZrO₂+PbO₂ electrode were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), linear sweep voltammetry, electrochemical impedance spectroscopy and cyclic voltammotry. In addition, the Nb/PbO₂ electrode was used as an anode for the electrochemical degradation of methyl orange (MO). Results revealed that the ZrO₂ doping made the Nb/PbO2 electrode surface denser and rougher with smaller sized crystal particles, which increased the specific surface area and enhanced the electrocatalytic activity of the electrode. The Nb/ZrO₂+PbO₂ electrode was mainly composed of β-PbO₂ with a small amount of α-PbO₂ and ZrO₂ formed by codeposition. Accordingly, the Nb/ZrO₂+PbO₂ electrode possessed higher oxygen-evolution potential, larger adsorption capacity and lower charge-transfer resistance, as well as higher electrocatalytic activity in the degradation of organic materials than the Nb/PbO₂ electrode. The MO degradation processes were irreversible and controlled by diffusion.

Graphical Abstract

Keywords

ZrO2, niobium-base lead dioxide, electro-catalytic activity, methyl orange

DOI Link

https://doi.org/10.13208/j.electrochem.141028

Publication Date

2015-06-28

Online Available Date

2015-06-28

Revised Date

2015-01-12

Received Date

2014-10-28

Recommended Citation

Li ZHANG, Wen-yan DONG, Tai-lai YANG, Zhen-hai LIANG. Preparation of ZrO₂-Doped Nb/PbO₂ Electrode and Electrocatalytic Performance of Methyl Orange Degradation[J]. Journal of Electrochemistry, 2015 , 21(3): 294-298.
DOI: 10.13208/j.electrochem.141028
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss3/10