Potential instabilities of lead-silver alloy anodes in acidic sulfate electrolytes

被引：0
|
作者：
Cachet C. [1 ]
Le Pape-Rérolle C. [1 ]
Wiart R. [1 ]
机构：
[1] UPR 15 du CNRS, Phys. des Liquides et Electrochimie, Univ. Pierre et Marie Curie, 75252 Paris Cedex 05
来源：
Journal of Applied Electrochemistry | 1998年 / 28卷 / 2期
关键词：
Impedance; Inhibiting adsorbate; Oxygen evolution; Pb and Pb-Ag anode; Potential oscillations;
D O I：
10.1023/A:1003234826323
中图分类号：
学科分类号：
摘要：
The kinetic behaviour of lead and lead-silver anodes, polarized under galvanostatic conditions in a H2SO4-ZnSO4-MnSO4 electrolyte, has been studied. Whereas the potential of the lead anode stabilizes during electrolysis, the potential of the lead-silver alloy anode oscillates between two limits after an induction time. Both silver on the anode surface and manganese in the electrolyte are required for the potential oscillations to appear. With increasing time the potential oscillations change in shape and period. From impedance data obtained earlier, at the beginning of, and during the potential oscillations, it is shown that the potential instabilities originate from electrode coverage by a silver salt adsorbate.
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页码：193 / 199
页数：6
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