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Effects of Samarium on the Properties of the Anodic Pb(II) Oxides Film Formed on Pb in Sulfuric Acid Solution
Author(s) -
Liu HouTian,
Yang ChunXiao,
Zhang XinHua,
Zhou YanBao,
Zhou WeiFang
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200613
Subject(s) - samarium , chemistry , linear sweep voltammetry , dielectric spectroscopy , scanning electron microscope , sulfuric acid , porosity , cyclic voltammetry , electrochemistry , metal , inorganic chemistry , anode , analytical chemistry (journal) , electrode , materials science , composite material , organic chemistry
The effects of samarium on the properties of the anodic Pb(II) oxides films formed on lead at 0.9 V (vs. Hg/Hg 2 SO 4 ) in 4.5 mol/L H 2 SO 4 solution were studied using linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and scanning electron micrographs (SEM). The experimental results show that adding Sm to lead metal can inhibit the growth of the Pb(II) oxides film effectively, and reduce the resistance of the PbO oxides film obviously. The addition of Sm increases the porosity of the anodic film, which may cause the increase of the ionic conductance produced by the interstitial liquid among the PbO particles in the film and lead to the decrease of the resistance of the anodic film.