The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide

The anodic oxidation of SCN- ion dissolved as KSCN in dimethylsulphoxide, on platinum electrodes, was investigated at cu 25,60 and 160°C by means of various non-stationary electrochemical techniques. At low temperatures one anodic and two main cathodic processes were found. The anodic oxidation of S...

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Autores principales: Martínez, C., Calandra, Alfredo J., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1972
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167512
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167512
record_format dspace
spelling I19-R120-10915-1675122024-06-25T20:08:03Z http://sedici.unlp.edu.ar/handle/10915/167512 The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide Martínez, C. Calandra, Alfredo J. Arvia, Alejandro Jorge 1972 2024-06-25T18:34:21Z en Química The anodic oxidation of SCN- ion dissolved as KSCN in dimethylsulphoxide, on platinum electrodes, was investigated at cu 25,60 and 160°C by means of various non-stationary electrochemical techniques. At low temperatures one anodic and two main cathodic processes were found. The anodic oxidation of SCN- ion yields as primary product the SCN radical, which readily produces (SCN)*. The latter can be in part reduced back to SCN- ion, because it reacts in part yielding solvated hydrogen ions which cause the second cathodic reaction. In the region of 60”C, no (SCN), cathodic current is observed. In the region of 160°C the only reaction is SCN- ion oxidation and the primary product polymerizes to (SCN)., which forms a film on the electrode, causing passivation. On the basis of kinetic data obtained for the different reactions, a mechanism for the anodic oxidation of the SCN- ion and for the passivating film formation is suggested. The second process only partly fits the Mtlller model for the electrochemical growth of insoluble layers. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 2153-2179
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Martínez, C.
Calandra, Alfredo J.
Arvia, Alejandro Jorge
The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
topic_facet Química
description The anodic oxidation of SCN- ion dissolved as KSCN in dimethylsulphoxide, on platinum electrodes, was investigated at cu 25,60 and 160°C by means of various non-stationary electrochemical techniques. At low temperatures one anodic and two main cathodic processes were found. The anodic oxidation of SCN- ion yields as primary product the SCN radical, which readily produces (SCN)*. The latter can be in part reduced back to SCN- ion, because it reacts in part yielding solvated hydrogen ions which cause the second cathodic reaction. In the region of 60”C, no (SCN), cathodic current is observed. In the region of 160°C the only reaction is SCN- ion oxidation and the primary product polymerizes to (SCN)., which forms a film on the electrode, causing passivation. On the basis of kinetic data obtained for the different reactions, a mechanism for the anodic oxidation of the SCN- ion and for the passivating film formation is suggested. The second process only partly fits the Mtlller model for the electrochemical growth of insoluble layers.
format Articulo
Articulo
author Martínez, C.
Calandra, Alfredo J.
Arvia, Alejandro Jorge
author_facet Martínez, C.
Calandra, Alfredo J.
Arvia, Alejandro Jorge
author_sort Martínez, C.
title The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
title_short The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
title_full The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
title_fullStr The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
title_full_unstemmed The anodic oxidation of thiocyanate ion dissolved as KSCN in dimethylsulphoxide
title_sort anodic oxidation of thiocyanate ion dissolved as kscn in dimethylsulphoxide
publishDate 1972
url http://sedici.unlp.edu.ar/handle/10915/167512
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