Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes

The application of a periodic perturbing potential to a cobalt electrode immersed in alkaline solutions at room temperature allows accumulation of a hydrous cobalt hydroxide overlayer which becomes a precursor to the production of a rough Co<sub>3</sub>O<sub>4</sub> spinel fi...

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Autores principales: Kessler, Teresita, Visintin, Arnaldo, Triaca, Walter Enrique, Arvia, Alejandro Jorge, Gennero de Chialvo, Maria Rosa
Formato: Articulo
Lenguaje:Inglés
Publicado: 1991
Materias:
Ciencias Exactas
Física
Química
cobalt electrode
alkaline solutions
voltammetry
hydrogen evolution reaction
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131034
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131034
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Química
cobalt electrode
alkaline solutions
voltammetry
hydrogen evolution reaction
spellingShingle Ciencias Exactas
Física
Química
cobalt electrode
alkaline solutions
voltammetry
hydrogen evolution reaction
Kessler, Teresita
Visintin, Arnaldo
Triaca, Walter Enrique
Arvia, Alejandro Jorge
Gennero de Chialvo, Maria Rosa
Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
topic_facet Ciencias Exactas
Física
Química
cobalt electrode
alkaline solutions
voltammetry
hydrogen evolution reaction
description The application of a periodic perturbing potential to a cobalt electrode immersed in alkaline solutions at room temperature allows accumulation of a hydrous cobalt hydroxide overlayer which becomes a precursor to the production of a rough Co<sub>3</sub>O<sub>4</sub> spinel film through subsequent thermal treatment at 480°C. The optimal working conditions for the application of this procedure are discussed. The properties of the resulting overlayers were determined through voltammetry, X-ray analysis, infrared spectroscopy, thermal gravimetric and differential thermal analysis, and SEM micrography. The explanation of the entire process is given in terms of sequential electrochemical oxidation and reduction reactions involving different Co-containing species. The electroreduction reactions including the HER, play an important role in determining the characteristics of the resulting Co<sub>3</sub>O<sub>4</sub> overlayer.
format Articulo
Articulo
author Kessler, Teresita
Visintin, Arnaldo
Triaca, Walter Enrique
Arvia, Alejandro Jorge
Gennero de Chialvo, Maria Rosa
author_facet Kessler, Teresita
Visintin, Arnaldo
Triaca, Walter Enrique
Arvia, Alejandro Jorge
Gennero de Chialvo, Maria Rosa
author_sort Kessler, Teresita
title Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
title_short Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
title_full Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
title_fullStr Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
title_full_unstemmed Preparation and modification of hydrous thick cobalt oxide layers : Voltammetric characteristics of rough Co<sub>3</sub>O<sub>4</sub>-spinel-type electrodes
title_sort preparation and modification of hydrous thick cobalt oxide layers : voltammetric characteristics of rough co<sub>3</sub>o<sub>4</sub>-spinel-type electrodes
publishDate 1991
url http://sedici.unlp.edu.ar/handle/10915/131034
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AT gennerodechialvomariarosa preparationandmodificationofhydrousthickcobaltoxidelayersvoltammetriccharacteristicsofroughcosub3subosub4subspineltypeelectrodes
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