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Redox reactions of hydrosulphide ions on the platinum electrode—I. The presence of intermediate polysulphide ions and sulphur layers

✍ Scribed by J. Szynkarczuk; P.G. Komorowski; J.C. Donini

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
474 KB
Volume
39
Category
Article
ISSN
0013-4686

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✦ Synopsis

The electrochemical and chemical reactions occurring at a platinum electrode immersed in an Na,S solution were investigated by cyclic voltammetry and controlled-potential electrolysis. It was found that the HS-ions were oxidized in two stages; the first one was the process of oxidizing the hydrosulphide ions into intermediate polysulphite ions, and the second was the further oxidization to elemental sulphur. The formation of a sulphur film significantly reduced the rate of electrolysis. The chemical dissolution of this film was found to mitigate the electrode blocking effect.

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