Effect of the potential on the electrochemically induced ageing of polyaniline films

Autores
Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrochemically induced ageing of polyaniline films, as a function of the ageing potential, was investigated employing films of different thicknesses in 3.7 M H2SO4 solutions. The ageing process was monitored by the change of the voltammetric response in a subsequent positive going potential scan after the ageing. It is observed that the ageing process, at more positive potentials, involves increasing amounts of non-reduced polymer. Also, it is observed that the rate of ageing decreases as the ageing potential increases. The changes in the voltammetric response after ageing is interpreted through a model for the voltammetric response, previously developed, that includes capacitive currents and interactions between the redox centers. The analysis shows that neither the capacitive parameters nor the total faradaic charge change during the ageing. On the other hand, only the interaction energy between the reduced centers change during the ageing. This fact leads to a narrowing of the formal redox potential distribution that can be characterized by the apparent number of exchanged electrons. The decrease of the interaction energy between reduced centers is consistent with the reduction of the free energy of the polymer during the ageing. The kinetics of ageing is analyzed through an Elovich type of equation from which k0, the pseudo zero order rate constant and β, a parameter that indicates how fast the activation free energy changes with the extent of the process, can be obtained. © 2012 Elsevier B.V. All rights reserved.
Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Materia
Electrochemical Ageing
Polyaniline
Potential Dependence
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/67846
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/67846
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of the potential on the electrochemically induced ageing of polyaniline filmsMarmisollé, Waldemar AlejandroFlorit, Maria InesPosadas, DionisioElectrochemical AgeingPolyanilinePotential Dependencehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The electrochemically induced ageing of polyaniline films, as a function of the ageing potential, was investigated employing films of different thicknesses in 3.7 M H2SO4 solutions. The ageing process was monitored by the change of the voltammetric response in a subsequent positive going potential scan after the ageing. It is observed that the ageing process, at more positive potentials, involves increasing amounts of non-reduced polymer. Also, it is observed that the rate of ageing decreases as the ageing potential increases. The changes in the voltammetric response after ageing is interpreted through a model for the voltammetric response, previously developed, that includes capacitive currents and interactions between the redox centers. The analysis shows that neither the capacitive parameters nor the total faradaic charge change during the ageing. On the other hand, only the interaction energy between the reduced centers change during the ageing. This fact leads to a narrowing of the formal redox potential distribution that can be characterized by the apparent number of exchanged electrons. The decrease of the interaction energy between reduced centers is consistent with the reduction of the free energy of the polymer during the ageing. The kinetics of ageing is analyzed through an Elovich type of equation from which k0, the pseudo zero order rate constant and β, a parameter that indicates how fast the activation free energy changes with the extent of the process, can be obtained. © 2012 Elsevier B.V. All rights reserved.Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaElsevier Science Sa2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/67846Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Effect of the potential on the electrochemically induced ageing of polyaniline films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 669; 3-2012; 42-491572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665712000306info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2012.01.017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:56:11Zoai:ri.conicet.gov.ar:11336/67846instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:56:11.602CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of the potential on the electrochemically induced ageing of polyaniline films
title Effect of the potential on the electrochemically induced ageing of polyaniline films
spellingShingle Effect of the potential on the electrochemically induced ageing of polyaniline films
Marmisollé, Waldemar Alejandro
Electrochemical Ageing
Polyaniline
Potential Dependence
title_short Effect of the potential on the electrochemically induced ageing of polyaniline films
title_full Effect of the potential on the electrochemically induced ageing of polyaniline films
title_fullStr Effect of the potential on the electrochemically induced ageing of polyaniline films
title_full_unstemmed Effect of the potential on the electrochemically induced ageing of polyaniline films
title_sort Effect of the potential on the electrochemically induced ageing of polyaniline films
dc.creator.none.fl_str_mv Marmisollé, Waldemar Alejandro
Florit, Maria Ines
Posadas, Dionisio
author Marmisollé, Waldemar Alejandro
author_facet Marmisollé, Waldemar Alejandro
Florit, Maria Ines
Posadas, Dionisio
author_role author
author2 Florit, Maria Ines
Posadas, Dionisio
author2_role author
author
dc.subject.none.fl_str_mv Electrochemical Ageing
Polyaniline
Potential Dependence
topic Electrochemical Ageing
Polyaniline
Potential Dependence
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The electrochemically induced ageing of polyaniline films, as a function of the ageing potential, was investigated employing films of different thicknesses in 3.7 M H2SO4 solutions. The ageing process was monitored by the change of the voltammetric response in a subsequent positive going potential scan after the ageing. It is observed that the ageing process, at more positive potentials, involves increasing amounts of non-reduced polymer. Also, it is observed that the rate of ageing decreases as the ageing potential increases. The changes in the voltammetric response after ageing is interpreted through a model for the voltammetric response, previously developed, that includes capacitive currents and interactions between the redox centers. The analysis shows that neither the capacitive parameters nor the total faradaic charge change during the ageing. On the other hand, only the interaction energy between the reduced centers change during the ageing. This fact leads to a narrowing of the formal redox potential distribution that can be characterized by the apparent number of exchanged electrons. The decrease of the interaction energy between reduced centers is consistent with the reduction of the free energy of the polymer during the ageing. The kinetics of ageing is analyzed through an Elovich type of equation from which k0, the pseudo zero order rate constant and β, a parameter that indicates how fast the activation free energy changes with the extent of the process, can be obtained. © 2012 Elsevier B.V. All rights reserved.
Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
description The electrochemically induced ageing of polyaniline films, as a function of the ageing potential, was investigated employing films of different thicknesses in 3.7 M H2SO4 solutions. The ageing process was monitored by the change of the voltammetric response in a subsequent positive going potential scan after the ageing. It is observed that the ageing process, at more positive potentials, involves increasing amounts of non-reduced polymer. Also, it is observed that the rate of ageing decreases as the ageing potential increases. The changes in the voltammetric response after ageing is interpreted through a model for the voltammetric response, previously developed, that includes capacitive currents and interactions between the redox centers. The analysis shows that neither the capacitive parameters nor the total faradaic charge change during the ageing. On the other hand, only the interaction energy between the reduced centers change during the ageing. This fact leads to a narrowing of the formal redox potential distribution that can be characterized by the apparent number of exchanged electrons. The decrease of the interaction energy between reduced centers is consistent with the reduction of the free energy of the polymer during the ageing. The kinetics of ageing is analyzed through an Elovich type of equation from which k0, the pseudo zero order rate constant and β, a parameter that indicates how fast the activation free energy changes with the extent of the process, can be obtained. © 2012 Elsevier B.V. All rights reserved.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/67846
Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Effect of the potential on the electrochemically induced ageing of polyaniline films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 669; 3-2012; 42-49
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/67846
identifier_str_mv Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Effect of the potential on the electrochemically induced ageing of polyaniline films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 669; 3-2012; 42-49
1572-6657
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665712000306
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2012.01.017
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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