硫酸介质中Pb电极氧化物成长过程的研究  

The Study of the Growth Processes of the Oxides on Lead Electrodes in Sulfuric Acid Solution

作　　者：翟和生 陈旭光[1] 尤金跨[1] 杨勇[1] 林祖赓[1] 

机构地区：[1]厦门大学化学系

出　　处：《电化学》1995年第1期65-69,共5页Journal of Electrochemistry

基　　金：国家自然科学基金

摘　　要：采用实时交流阻抗测量与激光扫描微区光电流技术相结合的现场方法，对铅电极在硫酸溶液中ＰｂＯ和ＰｂＯ＿２的生长过程进行了研究．发现电极在ＰｂＯ的形成区中氧化５ｍｉｎ后，电极欧姆阻抗和ｔ￣（１／２）呈一直线关系，这表明ＰｂＯ是均匀分布在电极表面而成长的．激光扫描微区光电流的实验进一步证实了这一结论．实验中还发现ＰｂＯ＿２在ＰｂＯ层中是局部发生与发展的．The growth processes of PbO and PbO_2 on lead electrodes have been investigatedby using in-situ methods that are combined with temporary AC resistance measurment technique andin-situ laser scanning photoelectrochemical microscopy.It is found that a linear relationship existsbetween the electrode resistance(R)and￣(1/2) after the electrode is oxidized at +0.6 V(vs.Hg/H_2SO_4/35%H_2SO_4)for more than 5 min.This result suggests that the growth of PbO is well distributedduring the early stage of oxidation.The study by using laser scanning photoelectrochemical microscopyhas further proved this point.The results also show that the growth of PbO_2 takes place and develops.

关 键 词：铅电极 交流阻抗技术 激光扫描 氧化铅 

分 类 号：O614.433[理学—无机化学] O646.542[理学—化学]