Effects of Temperature on the Nucleation and Growth Mechanism of PbO₂ Electrodeposition

Authors

Lei WANG, School of metallurgical engineering, Xi'an University of Architecture And Technology，xi’an 710055,shanxi,china;
Juan-qin XUE, School of metallurgical engineering, Xi'an University of Architecture And Technology，xi’an 710055,shanxi,china;Follow
Li-hua YU, School of metallurgical engineering, Xi'an University of Architecture And Technology，xi’an 710055,shanxi,china;
Chang-bin TANG, School of metallurgical engineering, Xi'an University of Architecture And Technology，xi’an 710055,shanxi,china;
Qiang BI, School of metallurgical engineering, Xi'an University of Architecture And Technology，xi’an 710055,shanxi,china;

Corresponding Author

Juan-qin XUE(huagong1985@163.com)

Abstract

In order to investigate the effects of temperature on the nucleation and growth of lead dioxide (PbO₂)， the in situ electrochemical depositions of PbO₂ were carried out on the glassy carbon electrode at different temperatures, namely, 25℃,35℃, 45℃, 55℃, and 65℃.The cyclic voltammetric curves, the time-current and the time-potential curves，SEM images and XRD patterns of the PbO₂ coatings deposited at different temperatures were obtained. The results showed that the PbO₂ underwent nucleation and grew at different temperatures. The 3D continuous nucleation mode of PbO₂ electrodeposition remained unchanged with the increase of temperature. However, the solution resistance during the deposition process was decreased. The nucleation rate and the crystal growth rate were both promoted by the increase of temperature. Before reaching the saturated nucleation density, the nucleation rate was accelerated，and the size of PbO₂ particles was reduced. During the later stage of the deposition, once the saturated nucleation density was attained, the nucleation rate became prodimnant, which adversely influenced the crystal growth rate，and the coating was not conductive to the formation of small PbO₂ particles. High temperature enhanced the oxygen evolution rate and increased the energy consumption. The average particle size of PbO₂ obtained at 55 ℃ was the smallest one among the five temperatures tested.

Graphical Abstract

Keywords

PbO2, electrodeposition, nucleation and growth, temperature

DOI Link

https://doi.org/10.13208/j.electrochem.160707

Publication Date

2017-08-25

Online Available Date

2016-12-02

Revised Date

2016-09-09

Received Date

2016-07-07

Recommended Citation

Lei WANG, Juan-qin XUE, Li-hua YU, Chang-bin TANG, Qiang BI. Effects of Temperature on the Nucleation and Growth Mechanism of PbO₂ Electrodeposition[J]. Journal of Electrochemistry, 2017 , 23(4): 480-488.
DOI: 10.13208/j.electrochem.160707
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss4/13

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