Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions

The electrochemical behavior of copper electrodes in different carbonate bicarbonate solutions, with emphasis in the potential region of Cu(I) aide electroformation and electro-reduction has been studied by voltammetric techniques, scanning electron microscopy (SEM) and electrochemical impedance spe...

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Autores principales: Ribotta, S. B., Folquer, M. E., Gassa, Liliana Mabel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2003
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167218
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167218
record_format dspace
spelling I19-R120-10915-1672182024-06-13T20:10:01Z http://sedici.unlp.edu.ar/handle/10915/167218 Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions Ribotta, S. B. Folquer, M. E. Gassa, Liliana Mabel 2003 2024-06-13T15:08:22Z en Química The electrochemical behavior of copper electrodes in different carbonate bicarbonate solutions, with emphasis in the potential region of Cu(I) aide electroformation and electro-reduction has been studied by voltammetric techniques, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The occurrence of both chemical surface transformations and dissolution processes involving the species formed during the electrochemical reaction are reported. The open circuit experiments reveal the stability of CuO in spite of the presence of bicarbonate as the aggressive ion. SEM micrographs of the electrode surface allow the characteristics of the different surface products to be distinguished. Capacitance values obtained by EIS reflect the porous nature of the first oxide film electroformed. El comportamiento electroquímico de electrodos de cobre en diferen tes soluciones de bicarbonato-carbonato, con énfasis en la región de potencial de electroformación y de electro-reducción de óxido de Cu(I), ha sido estudiado por técnicas voltamétricas, microscopía electrónica de barrido (SEM) y espectroscopia de impedancia electroquímica (EIS). Se informa la ocurrencia de transformaciones químicas superficiales y de procesos de disolución involucrando las especies formadas durante la reacción electroquímica. Los experimentos a circuito abierto revelan la estabilidad del Cu2O, a pesar de la presencia del bicarbonato como el ion agresivo. Las microfotografías SEM de la superficie del electrodo permiten distinguir las características de los diferentes productos superficiales. Los valores de capacidad obtenidos por EIS reflejan la naturaleza porosa de la película del primer óxido electroforinado. 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 55-64
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Ribotta, S. B.
Folquer, M. E.
Gassa, Liliana Mabel
Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
topic_facet Química
description The electrochemical behavior of copper electrodes in different carbonate bicarbonate solutions, with emphasis in the potential region of Cu(I) aide electroformation and electro-reduction has been studied by voltammetric techniques, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The occurrence of both chemical surface transformations and dissolution processes involving the species formed during the electrochemical reaction are reported. The open circuit experiments reveal the stability of CuO in spite of the presence of bicarbonate as the aggressive ion. SEM micrographs of the electrode surface allow the characteristics of the different surface products to be distinguished. Capacitance values obtained by EIS reflect the porous nature of the first oxide film electroformed.
format Articulo
Articulo
author Ribotta, S. B.
Folquer, M. E.
Gassa, Liliana Mabel
author_facet Ribotta, S. B.
Folquer, M. E.
Gassa, Liliana Mabel
author_sort Ribotta, S. B.
title Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
title_short Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
title_full Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
title_fullStr Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
title_full_unstemmed Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
title_sort electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
publishDate 2003
url http://sedici.unlp.edu.ar/handle/10915/167218
work_keys_str_mv AT ribottasb electrochemicalstudyofthefirstlayersofoxideformedoncopperincarbonatebicarbonatesolutions
AT folquerme electrochemicalstudyofthefirstlayersofoxideformedoncopperincarbonatebicarbonatesolutions
AT gassalilianamabel electrochemicalstudyofthefirstlayersofoxideformedoncopperincarbonatebicarbonatesolutions
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