An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique

Autores
Tucceri, Ismael Ricardo
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Simultaneous cyclic voltammetry (CV) and surface resistance (SR) measurements were employed to study the electrochemical behaviour of the nickel hydroxide-gold modified electrode. To this end, firstly, gold film electrodes of different thicknesses were synthesized, and their CV and SR responses within the potential regions corresponding to hydroxide ion adsorption (OHads) and gold oxide (AuO) formation in alkaline medium were analysed. Then, these gold film electrodes were modified with different nickel hydroxide surface coverages, and their CV and SR responses were compared with those of bare gold films within the same potential regions and electrolyte solution. While cyclic voltammetric responses of the bare gold film electrode and the nickel hydroxide-gold film modified electrode are practically the same within the whole potential range - 0.5 V < E < 0.35 V (SCE), SR responses are the same only within the potential range - 0.3 V < E < 0.35 V. Strong differences between the SR responses of the bare gold electrode and the nickel hydroxide-gold modified electrode within the potential range comprised between - 0.5 V and - 0.3 V are observed. SR data were interpreted in terms of the field effect and size effect theories formulated to study adsorption processes at thin metallic films. With regard to the bare gold film electrode, the field effect theory allows one to conclude that within the potential region corresponding to hydroxide ion adsorption, 77% of the electron density charge of gold is involved in the hydroxide ion-gold interaction. Besides, a linear relation between the surface resistance change (ΔR) and the degree of oxidation (θox) at fixed gold film thickness (φm) is obtained within the potential region corresponding to gold oxide formation. In agreement with the size effect theory, the ΔR/θox slope exhibits a linear dependence on φm - 2. The same SR responses for the nickel hydroxide-gold modified electrode and the bare gold electrode within the potential range - 0.3 V < E < 0.35 V indicate that the nickel hydroxide layer does not directly interact with the gold film surface. However, after the reduction of OHads and AuO layers, at potential values more negative than - 0.3 V (SCE), an increase of the surface resistance is observed for the nickel hydroxide-gold modified electrode, which was attributed to nickel adatoms that directly interact with the gold film surface. On the basis of the electron conduction scattering model employed to describe the interaction of a metal film surface with a foreign atom layer, one can conclude that nickel film growth involves an initial stage in which nickel islands and then, compact structures are formed.
Fil: Tucceri, Ismael Ricardo. 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
Field And Size Effects in Thin Film Electrodes
Nickel Adatoms
Nickel Hydroxide Surface Coverage
Nickel Hydroxide-Gold Modified Electrode
Surface Resistance
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:11336/61614

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oai_identifier_str oai:ri.conicet.gov.ar:11336/61614
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance techniqueTucceri, Ismael RicardoField And Size Effects in Thin Film ElectrodesNickel AdatomsNickel Hydroxide Surface CoverageNickel Hydroxide-Gold Modified ElectrodeSurface Resistancehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Simultaneous cyclic voltammetry (CV) and surface resistance (SR) measurements were employed to study the electrochemical behaviour of the nickel hydroxide-gold modified electrode. To this end, firstly, gold film electrodes of different thicknesses were synthesized, and their CV and SR responses within the potential regions corresponding to hydroxide ion adsorption (OHads) and gold oxide (AuO) formation in alkaline medium were analysed. Then, these gold film electrodes were modified with different nickel hydroxide surface coverages, and their CV and SR responses were compared with those of bare gold films within the same potential regions and electrolyte solution. While cyclic voltammetric responses of the bare gold film electrode and the nickel hydroxide-gold film modified electrode are practically the same within the whole potential range - 0.5 V < E < 0.35 V (SCE), SR responses are the same only within the potential range - 0.3 V < E < 0.35 V. Strong differences between the SR responses of the bare gold electrode and the nickel hydroxide-gold modified electrode within the potential range comprised between - 0.5 V and - 0.3 V are observed. SR data were interpreted in terms of the field effect and size effect theories formulated to study adsorption processes at thin metallic films. With regard to the bare gold film electrode, the field effect theory allows one to conclude that within the potential region corresponding to hydroxide ion adsorption, 77% of the electron density charge of gold is involved in the hydroxide ion-gold interaction. Besides, a linear relation between the surface resistance change (ΔR) and the degree of oxidation (θox) at fixed gold film thickness (φm) is obtained within the potential region corresponding to gold oxide formation. In agreement with the size effect theory, the ΔR/θox slope exhibits a linear dependence on φm - 2. The same SR responses for the nickel hydroxide-gold modified electrode and the bare gold electrode within the potential range - 0.3 V < E < 0.35 V indicate that the nickel hydroxide layer does not directly interact with the gold film surface. However, after the reduction of OHads and AuO layers, at potential values more negative than - 0.3 V (SCE), an increase of the surface resistance is observed for the nickel hydroxide-gold modified electrode, which was attributed to nickel adatoms that directly interact with the gold film surface. On the basis of the electron conduction scattering model employed to describe the interaction of a metal film surface with a foreign atom layer, one can conclude that nickel film growth involves an initial stage in which nickel islands and then, compact structures are formed.Fil: Tucceri, Ismael Ricardo. 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 Sa2016-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61614Tucceri, Ismael Ricardo; An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 774; 8-2016; 95-1011572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2016.05.006info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665716302326info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:33:26Zoai:ri.conicet.gov.ar:11336/61614instacron: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 10:33:26.476CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
title An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
spellingShingle An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
Tucceri, Ismael Ricardo
Field And Size Effects in Thin Film Electrodes
Nickel Adatoms
Nickel Hydroxide Surface Coverage
Nickel Hydroxide-Gold Modified Electrode
Surface Resistance
title_short An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
title_full An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
title_fullStr An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
title_full_unstemmed An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
title_sort An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique
dc.creator.none.fl_str_mv Tucceri, Ismael Ricardo
author Tucceri, Ismael Ricardo
author_facet Tucceri, Ismael Ricardo
author_role author
dc.subject.none.fl_str_mv Field And Size Effects in Thin Film Electrodes
Nickel Adatoms
Nickel Hydroxide Surface Coverage
Nickel Hydroxide-Gold Modified Electrode
Surface Resistance
topic Field And Size Effects in Thin Film Electrodes
Nickel Adatoms
Nickel Hydroxide Surface Coverage
Nickel Hydroxide-Gold Modified Electrode
Surface Resistance
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Simultaneous cyclic voltammetry (CV) and surface resistance (SR) measurements were employed to study the electrochemical behaviour of the nickel hydroxide-gold modified electrode. To this end, firstly, gold film electrodes of different thicknesses were synthesized, and their CV and SR responses within the potential regions corresponding to hydroxide ion adsorption (OHads) and gold oxide (AuO) formation in alkaline medium were analysed. Then, these gold film electrodes were modified with different nickel hydroxide surface coverages, and their CV and SR responses were compared with those of bare gold films within the same potential regions and electrolyte solution. While cyclic voltammetric responses of the bare gold film electrode and the nickel hydroxide-gold film modified electrode are practically the same within the whole potential range - 0.5 V < E < 0.35 V (SCE), SR responses are the same only within the potential range - 0.3 V < E < 0.35 V. Strong differences between the SR responses of the bare gold electrode and the nickel hydroxide-gold modified electrode within the potential range comprised between - 0.5 V and - 0.3 V are observed. SR data were interpreted in terms of the field effect and size effect theories formulated to study adsorption processes at thin metallic films. With regard to the bare gold film electrode, the field effect theory allows one to conclude that within the potential region corresponding to hydroxide ion adsorption, 77% of the electron density charge of gold is involved in the hydroxide ion-gold interaction. Besides, a linear relation between the surface resistance change (ΔR) and the degree of oxidation (θox) at fixed gold film thickness (φm) is obtained within the potential region corresponding to gold oxide formation. In agreement with the size effect theory, the ΔR/θox slope exhibits a linear dependence on φm - 2. The same SR responses for the nickel hydroxide-gold modified electrode and the bare gold electrode within the potential range - 0.3 V < E < 0.35 V indicate that the nickel hydroxide layer does not directly interact with the gold film surface. However, after the reduction of OHads and AuO layers, at potential values more negative than - 0.3 V (SCE), an increase of the surface resistance is observed for the nickel hydroxide-gold modified electrode, which was attributed to nickel adatoms that directly interact with the gold film surface. On the basis of the electron conduction scattering model employed to describe the interaction of a metal film surface with a foreign atom layer, one can conclude that nickel film growth involves an initial stage in which nickel islands and then, compact structures are formed.
Fil: Tucceri, Ismael Ricardo. 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 Simultaneous cyclic voltammetry (CV) and surface resistance (SR) measurements were employed to study the electrochemical behaviour of the nickel hydroxide-gold modified electrode. To this end, firstly, gold film electrodes of different thicknesses were synthesized, and their CV and SR responses within the potential regions corresponding to hydroxide ion adsorption (OHads) and gold oxide (AuO) formation in alkaline medium were analysed. Then, these gold film electrodes were modified with different nickel hydroxide surface coverages, and their CV and SR responses were compared with those of bare gold films within the same potential regions and electrolyte solution. While cyclic voltammetric responses of the bare gold film electrode and the nickel hydroxide-gold film modified electrode are practically the same within the whole potential range - 0.5 V < E < 0.35 V (SCE), SR responses are the same only within the potential range - 0.3 V < E < 0.35 V. Strong differences between the SR responses of the bare gold electrode and the nickel hydroxide-gold modified electrode within the potential range comprised between - 0.5 V and - 0.3 V are observed. SR data were interpreted in terms of the field effect and size effect theories formulated to study adsorption processes at thin metallic films. With regard to the bare gold film electrode, the field effect theory allows one to conclude that within the potential region corresponding to hydroxide ion adsorption, 77% of the electron density charge of gold is involved in the hydroxide ion-gold interaction. Besides, a linear relation between the surface resistance change (ΔR) and the degree of oxidation (θox) at fixed gold film thickness (φm) is obtained within the potential region corresponding to gold oxide formation. In agreement with the size effect theory, the ΔR/θox slope exhibits a linear dependence on φm - 2. The same SR responses for the nickel hydroxide-gold modified electrode and the bare gold electrode within the potential range - 0.3 V < E < 0.35 V indicate that the nickel hydroxide layer does not directly interact with the gold film surface. However, after the reduction of OHads and AuO layers, at potential values more negative than - 0.3 V (SCE), an increase of the surface resistance is observed for the nickel hydroxide-gold modified electrode, which was attributed to nickel adatoms that directly interact with the gold film surface. On the basis of the electron conduction scattering model employed to describe the interaction of a metal film surface with a foreign atom layer, one can conclude that nickel film growth involves an initial stage in which nickel islands and then, compact structures are formed.
publishDate 2016
dc.date.none.fl_str_mv 2016-08
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/11336/61614
Tucceri, Ismael Ricardo; An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 774; 8-2016; 95-101
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61614
identifier_str_mv Tucceri, Ismael Ricardo; An electrochemical study of the nickel hydroxide-gold modified electrode employing the surface resistance technique; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 774; 8-2016; 95-101
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.2016.05.006
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665716302326
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
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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