电化学2017，Vol.23Issue(4)：480-488,9.DOI:10.13208/j.electrochem.160707
温度对PbO2电沉积形核生长过程的影响研究
Effects of Temperature on the Nucleation and Growth Mechanism of PbO2 Electrodeposition
摘要
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.关键词
PbO2/电沉积/形核生长/温度Key words
PbO2/electrodeposition/nucleation and growth/temperature分类
化学化工引用本文复制引用
王磊,薛娟琴,于丽花,唐长斌,毕强..温度对PbO2电沉积形核生长过程的影响研究[J].电化学,2017,23(4):480-488,9.基金项目
国家自然科学基金项目(No.51478379,No.51408468)及陕西省重大基础研究项目(2017ZDJC-25)资助 （No.51478379,No.51408468）
