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http://dx.doi.org/10.7844/kirr.2017.26.4.34

Anodic Reactions at a Pb-Ag Anode in Sulfuric Acid Solutions Containing Manganese(II)  

Lee, Man-Seung (Department of Advanced Materials Science & Engineering, Mokpo National University)
Nicol, M.J. (School of Engineering and Information Technology, Murdoch University)
Publication Information
Resources Recycling / v.26, no.4, 2017 , pp. 34-41 More about this Journal
Abstract
The effect of Mn(II) concentration on the anodic reactions occurring on a Pb-Ag electrode in sulfuric acid solutions has been studied by potentiostatic oxidation in the potential range of 1.8 to 2.0 V. High oxidation potentials and low initial concentrations of Mn(II) resulted in higher concentrations of soluble Mn(III) ions which were obtained from spectrophotometric analysis of the solution after oxidation. $MnO_2$ was deposited on the electrode by electrochemical oxidation of Mn(II) at 1.8 and 1.9 V, while it was formed by disproportionation of Mn(III) at 2.0 V. No $PbO_2$ was formed in the presence of Mn(II) during potentiostatic oxidation treatment for two hours at 1.8 V. Chemical reduction of $PbO_2$ with Mn(II) led to a decrease in the amount of $PbO_2$ as Mn(II) concentration increased at 1.9 and 2.0 V.
Keywords
Oxidation; Pb-Ag anode; Manganese(II); Lead dioxide;
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