Characterization of anodic growth and dissolution of antimony oxide films

Autores
Linarez Pérez, Omar Ezequiel; Perez, Manuel Alejo; Lopez Teijelo, Manuel
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The anodic growth, morphology and stability of antimony oxide films grown in buffered phosphate electrolytes has been characterized by electrochemical methods, in situ ellipsometry and atomic force microscopy. The anodic voltammetric behaviour for the growth of antimony oxide films at low potentials can be interpreted as the stepwise electroformation of different antimony species with formation of soluble species up to give Sb2O3. This is followed by the anodic film growth at higher potentials through an ionic conduction mechanism caused by a 'high field', which drives the ionic migration as in typical "valve" metals. Ellipsometric results indicate that anodic films dissolve in the electrolysis media. Anodic Sb2O3 films are anisotropic, with complex refractive indices lower than those of crystalline antimony oxides. This is ascribed to hydration, anions incorporation or lack of crystalline structure in anodic oxides. The electric field strength obtained from the thickness/potential dependence, results 2.25 × 106 V cm-1, which also supports that anodic Sb2O3 growth takes place by an ionic current driven by a high electric field within the oxide film. Morphology of anodic Sb2O3 films obtained by AFM shows that surfaces are smooth and flat and films are pore-free. The grain texture depends on concentration of electrolyte as a consequence of a different chemical dissolution rate. The stability of passive antimony oxide films at open circuit was analyzed by cyclic voltammetry with either constant or increasing anodic switching potentials. The overall growth and dissolution of antimony oxide films is described in terms of the oxide film growth by the high-field migration model coupled with a homogeneous dissolution process. The parameters A and β in the equation i = A exp (βε) that characterize the dependence between current growth and field strength in the high-field growth as well as dissolution current for different conditions are obtained. Dissolution current dependence with electrolyte properties, indicate that antimony oxide dissolution is promoted by phosphate ions and is almost independent of pH. © 2009 Elsevier B.V. All rights reserved.
Fil: Linarez Pérez, Omar Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Lopez Teijelo, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Materia
Antimony Oxide
Ellipsometry
High-Field Growth
Oxide Dissolution
Oxide Growth
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:11336/72216
Acceder
id CONICETDig_e4212db88fc78e07ce636819ef002c70
oai_identifier_str oai:ri.conicet.gov.ar:11336/72216
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization of anodic growth and dissolution of antimony oxide filmsLinarez Pérez, Omar EzequielPerez, Manuel AlejoLopez Teijelo, ManuelAntimony OxideEllipsometryHigh-Field GrowthOxide DissolutionOxide Growthhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The anodic growth, morphology and stability of antimony oxide films grown in buffered phosphate electrolytes has been characterized by electrochemical methods, in situ ellipsometry and atomic force microscopy. The anodic voltammetric behaviour for the growth of antimony oxide films at low potentials can be interpreted as the stepwise electroformation of different antimony species with formation of soluble species up to give Sb2O3. This is followed by the anodic film growth at higher potentials through an ionic conduction mechanism caused by a 'high field', which drives the ionic migration as in typical "valve" metals. Ellipsometric results indicate that anodic films dissolve in the electrolysis media. Anodic Sb2O3 films are anisotropic, with complex refractive indices lower than those of crystalline antimony oxides. This is ascribed to hydration, anions incorporation or lack of crystalline structure in anodic oxides. The electric field strength obtained from the thickness/potential dependence, results 2.25 × 106 V cm-1, which also supports that anodic Sb2O3 growth takes place by an ionic current driven by a high electric field within the oxide film. Morphology of anodic Sb2O3 films obtained by AFM shows that surfaces are smooth and flat and films are pore-free. The grain texture depends on concentration of electrolyte as a consequence of a different chemical dissolution rate. The stability of passive antimony oxide films at open circuit was analyzed by cyclic voltammetry with either constant or increasing anodic switching potentials. The overall growth and dissolution of antimony oxide films is described in terms of the oxide film growth by the high-field migration model coupled with a homogeneous dissolution process. The parameters A and β in the equation i = A exp (βε) that characterize the dependence between current growth and field strength in the high-field growth as well as dissolution current for different conditions are obtained. Dissolution current dependence with electrolyte properties, indicate that antimony oxide dissolution is promoted by phosphate ions and is almost independent of pH. © 2009 Elsevier B.V. All rights reserved.Fil: Linarez Pérez, Omar Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; ArgentinaFil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; ArgentinaFil: Lopez Teijelo, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; ArgentinaElsevier Science Sa2009-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72216Linarez Pérez, Omar Ezequiel; Perez, Manuel Alejo; Lopez Teijelo, Manuel; Characterization of anodic growth and dissolution of antimony oxide films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 632; 1-2; 7-2009; 64-711572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2009.03.018info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022072809001132info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:19:55Zoai:ri.conicet.gov.ar:11336/72216instacron: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:34982025-09-29 10:19:55.792CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of anodic growth and dissolution of antimony oxide films
title Characterization of anodic growth and dissolution of antimony oxide films
spellingShingle Characterization of anodic growth and dissolution of antimony oxide films
Linarez Pérez, Omar Ezequiel
Antimony Oxide
Ellipsometry
High-Field Growth
Oxide Dissolution
Oxide Growth
title_short Characterization of anodic growth and dissolution of antimony oxide films
title_full Characterization of anodic growth and dissolution of antimony oxide films
title_fullStr Characterization of anodic growth and dissolution of antimony oxide films
title_full_unstemmed Characterization of anodic growth and dissolution of antimony oxide films
title_sort Characterization of anodic growth and dissolution of antimony oxide films
dc.creator.none.fl_str_mv Linarez Pérez, Omar Ezequiel
Perez, Manuel Alejo
Lopez Teijelo, Manuel
author Linarez Pérez, Omar Ezequiel
author_facet Linarez Pérez, Omar Ezequiel
Perez, Manuel Alejo
Lopez Teijelo, Manuel
author_role author
author2 Perez, Manuel Alejo
Lopez Teijelo, Manuel
author2_role author
author
dc.subject.none.fl_str_mv Antimony Oxide
Ellipsometry
High-Field Growth
Oxide Dissolution
Oxide Growth
topic Antimony Oxide
Ellipsometry
High-Field Growth
Oxide Dissolution
Oxide Growth
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 anodic growth, morphology and stability of antimony oxide films grown in buffered phosphate electrolytes has been characterized by electrochemical methods, in situ ellipsometry and atomic force microscopy. The anodic voltammetric behaviour for the growth of antimony oxide films at low potentials can be interpreted as the stepwise electroformation of different antimony species with formation of soluble species up to give Sb2O3. This is followed by the anodic film growth at higher potentials through an ionic conduction mechanism caused by a 'high field', which drives the ionic migration as in typical "valve" metals. Ellipsometric results indicate that anodic films dissolve in the electrolysis media. Anodic Sb2O3 films are anisotropic, with complex refractive indices lower than those of crystalline antimony oxides. This is ascribed to hydration, anions incorporation or lack of crystalline structure in anodic oxides. The electric field strength obtained from the thickness/potential dependence, results 2.25 × 106 V cm-1, which also supports that anodic Sb2O3 growth takes place by an ionic current driven by a high electric field within the oxide film. Morphology of anodic Sb2O3 films obtained by AFM shows that surfaces are smooth and flat and films are pore-free. The grain texture depends on concentration of electrolyte as a consequence of a different chemical dissolution rate. The stability of passive antimony oxide films at open circuit was analyzed by cyclic voltammetry with either constant or increasing anodic switching potentials. The overall growth and dissolution of antimony oxide films is described in terms of the oxide film growth by the high-field migration model coupled with a homogeneous dissolution process. The parameters A and β in the equation i = A exp (βε) that characterize the dependence between current growth and field strength in the high-field growth as well as dissolution current for different conditions are obtained. Dissolution current dependence with electrolyte properties, indicate that antimony oxide dissolution is promoted by phosphate ions and is almost independent of pH. © 2009 Elsevier B.V. All rights reserved.
Fil: Linarez Pérez, Omar Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Lopez Teijelo, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
description The anodic growth, morphology and stability of antimony oxide films grown in buffered phosphate electrolytes has been characterized by electrochemical methods, in situ ellipsometry and atomic force microscopy. The anodic voltammetric behaviour for the growth of antimony oxide films at low potentials can be interpreted as the stepwise electroformation of different antimony species with formation of soluble species up to give Sb2O3. This is followed by the anodic film growth at higher potentials through an ionic conduction mechanism caused by a 'high field', which drives the ionic migration as in typical "valve" metals. Ellipsometric results indicate that anodic films dissolve in the electrolysis media. Anodic Sb2O3 films are anisotropic, with complex refractive indices lower than those of crystalline antimony oxides. This is ascribed to hydration, anions incorporation or lack of crystalline structure in anodic oxides. The electric field strength obtained from the thickness/potential dependence, results 2.25 × 106 V cm-1, which also supports that anodic Sb2O3 growth takes place by an ionic current driven by a high electric field within the oxide film. Morphology of anodic Sb2O3 films obtained by AFM shows that surfaces are smooth and flat and films are pore-free. The grain texture depends on concentration of electrolyte as a consequence of a different chemical dissolution rate. The stability of passive antimony oxide films at open circuit was analyzed by cyclic voltammetry with either constant or increasing anodic switching potentials. The overall growth and dissolution of antimony oxide films is described in terms of the oxide film growth by the high-field migration model coupled with a homogeneous dissolution process. The parameters A and β in the equation i = A exp (βε) that characterize the dependence between current growth and field strength in the high-field growth as well as dissolution current for different conditions are obtained. Dissolution current dependence with electrolyte properties, indicate that antimony oxide dissolution is promoted by phosphate ions and is almost independent of pH. © 2009 Elsevier B.V. All rights reserved.
publishDate 2009
dc.date.none.fl_str_mv 2009-07
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/11336/72216
Linarez Pérez, Omar Ezequiel; Perez, Manuel Alejo; Lopez Teijelo, Manuel; Characterization of anodic growth and dissolution of antimony oxide films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 632; 1-2; 7-2009; 64-71
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72216
identifier_str_mv Linarez Pérez, Omar Ezequiel; Perez, Manuel Alejo; Lopez Teijelo, Manuel; Characterization of anodic growth and dissolution of antimony oxide films; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 632; 1-2; 7-2009; 64-71
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/doi/10.1016/j.jelechem.2009.03.018
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022072809001132
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
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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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