镨和钕对硫酸溶液中铅阳极膜阻抗特性的影响  

Effect of Pr and Nd on the Impedance Property of Anodic Pb(Ⅱ) film in Sulfuric Acid Solution

作　　者：刘芳清[1] 张新华[2] 马敏[2] 柳厚田[2] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090 [2]复旦大学化学系,上海200433

出　　处：《复旦学报（自然科学版）》2008年第5期659-662,共4页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目(20173013)

摘　　要：采用实时阻抗跟踪法、交流伏安法和电化学交流阻抗频谱法研究了稀土元素Pr和Nd添加对Pb在4.5mol.dm-3H2SO4中0.9 V(vs.Hg/Hg2SO4)下生长的阳极Pb(Ⅱ)膜阻抗特性的影响.结果表明,Pr和Nd均显著降低Pb(Ⅱ)阳极膜的阻抗,膜阻抗的降低很可能由于Pr3+和Nd3+的掺杂提高了Pb(Ⅱ)阳极膜电子电导率.Real time impedance tracing, ac voltammetry and electrochemical impedance spectroscopy have been applied to the study of the effect of Pr and Nd alloying agents on impedance properties of anodic Pb（ Ⅱ ） films formed on Pb-Pr and Pb-Nd alloys at 0.9 V （vs. Hg/Hg2SO4） in 4.5 tool. dm^-3 H2SO4. The results show that the two additives significantly decrease the impedance of anodic Pb（ Ⅱ ） film, which is likely attributed to enhanced electronic conductivity of anodic Pb （ Ⅱ ） films on Pb-Pr and Pb-Nd alloys.

关 键 词：铅合金 Pb(Ⅱ)阳极膜 阻抗特性 镨 钕 

分 类 号：O646.6[理学—物理化学]