Surface resistance change during nickel hydroxide phase transformations

Autores
Tucceri, Ismael Ricardo
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nickel hydroxide undergoes profound structural transformations under prolonged potential cycling in alkaline solutions. In this work, gold film electrodes modified with different nickel hydroxide coverages were subjected to continuous potentiodynamic cycling in alkaline medium, while the simultaneous evolution of voltammetric and surface resistance records was monitored until stable responses were obtained. A surface resistance (SR) increase proportional to the nickel hydroxide coverage was observed at potential values more negative than − 0.3 V (vs. SCE), which was attributed to the deposition of nickel adatoms from the reduction of nickel hydroxide layers. This SR change was analysed on the basis of the electron scattering theory, considering that nickel adatoms act as scatterers for the reflection of gold conduction electrons. The nickel adatom layer produced from the reduction of the nickel hydroxide structure formed during the first voltammetric scan potential cycles (< 40) exhibits a more specular reflection than that generated after a larger number of potential cycles (> 140). As the specularity of a layer for electron scattering can be associated with scatterer compactness, the distance between nickel atoms in the former nickel adatom structure is shorter than that in the last one.
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
Nickel Adatom Layer
Nickel Hydroxide-Gold Film Modified Electrode
Potentiodynamic Cycling
Surface Resistance
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63957
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/63957
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Surface resistance change during nickel hydroxide phase transformationsTucceri, Ismael RicardoNickel Adatom LayerNickel Hydroxide-Gold Film Modified ElectrodePotentiodynamic CyclingSurface Resistancehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Nickel hydroxide undergoes profound structural transformations under prolonged potential cycling in alkaline solutions. In this work, gold film electrodes modified with different nickel hydroxide coverages were subjected to continuous potentiodynamic cycling in alkaline medium, while the simultaneous evolution of voltammetric and surface resistance records was monitored until stable responses were obtained. A surface resistance (SR) increase proportional to the nickel hydroxide coverage was observed at potential values more negative than − 0.3 V (vs. SCE), which was attributed to the deposition of nickel adatoms from the reduction of nickel hydroxide layers. This SR change was analysed on the basis of the electron scattering theory, considering that nickel adatoms act as scatterers for the reflection of gold conduction electrons. The nickel adatom layer produced from the reduction of the nickel hydroxide structure formed during the first voltammetric scan potential cycles (< 40) exhibits a more specular reflection than that generated after a larger number of potential cycles (> 140). As the specularity of a layer for electron scattering can be associated with scatterer compactness, the distance between nickel atoms in the former nickel adatom structure is shorter than that in the last one.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 Sa2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63957Tucceri, Ismael Ricardo; Surface resistance change during nickel hydroxide phase transformations; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 792; 5-2017; 104-1091572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665717302175info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2017.03.039info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:55:39Zoai:ri.conicet.gov.ar:11336/63957instacron: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:34982025-10-22 11:55:39.642CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Surface resistance change during nickel hydroxide phase transformations
title Surface resistance change during nickel hydroxide phase transformations
spellingShingle Surface resistance change during nickel hydroxide phase transformations
Tucceri, Ismael Ricardo
Nickel Adatom Layer
Nickel Hydroxide-Gold Film Modified Electrode
Potentiodynamic Cycling
Surface Resistance
title_short Surface resistance change during nickel hydroxide phase transformations
title_full Surface resistance change during nickel hydroxide phase transformations
title_fullStr Surface resistance change during nickel hydroxide phase transformations
title_full_unstemmed Surface resistance change during nickel hydroxide phase transformations
title_sort Surface resistance change during nickel hydroxide phase transformations
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 Nickel Adatom Layer
Nickel Hydroxide-Gold Film Modified Electrode
Potentiodynamic Cycling
Surface Resistance
topic Nickel Adatom Layer
Nickel Hydroxide-Gold Film Modified Electrode
Potentiodynamic Cycling
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 Nickel hydroxide undergoes profound structural transformations under prolonged potential cycling in alkaline solutions. In this work, gold film electrodes modified with different nickel hydroxide coverages were subjected to continuous potentiodynamic cycling in alkaline medium, while the simultaneous evolution of voltammetric and surface resistance records was monitored until stable responses were obtained. A surface resistance (SR) increase proportional to the nickel hydroxide coverage was observed at potential values more negative than − 0.3 V (vs. SCE), which was attributed to the deposition of nickel adatoms from the reduction of nickel hydroxide layers. This SR change was analysed on the basis of the electron scattering theory, considering that nickel adatoms act as scatterers for the reflection of gold conduction electrons. The nickel adatom layer produced from the reduction of the nickel hydroxide structure formed during the first voltammetric scan potential cycles (< 40) exhibits a more specular reflection than that generated after a larger number of potential cycles (> 140). As the specularity of a layer for electron scattering can be associated with scatterer compactness, the distance between nickel atoms in the former nickel adatom structure is shorter than that in the last one.
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 Nickel hydroxide undergoes profound structural transformations under prolonged potential cycling in alkaline solutions. In this work, gold film electrodes modified with different nickel hydroxide coverages were subjected to continuous potentiodynamic cycling in alkaline medium, while the simultaneous evolution of voltammetric and surface resistance records was monitored until stable responses were obtained. A surface resistance (SR) increase proportional to the nickel hydroxide coverage was observed at potential values more negative than − 0.3 V (vs. SCE), which was attributed to the deposition of nickel adatoms from the reduction of nickel hydroxide layers. This SR change was analysed on the basis of the electron scattering theory, considering that nickel adatoms act as scatterers for the reflection of gold conduction electrons. The nickel adatom layer produced from the reduction of the nickel hydroxide structure formed during the first voltammetric scan potential cycles (< 40) exhibits a more specular reflection than that generated after a larger number of potential cycles (> 140). As the specularity of a layer for electron scattering can be associated with scatterer compactness, the distance between nickel atoms in the former nickel adatom structure is shorter than that in the last one.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
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/11336/63957
Tucceri, Ismael Ricardo; Surface resistance change during nickel hydroxide phase transformations; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 792; 5-2017; 104-109
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63957
identifier_str_mv Tucceri, Ismael Ricardo; Surface resistance change during nickel hydroxide phase transformations; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 792; 5-2017; 104-109
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/S1572665717302175
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2017.03.039
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/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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score 12.982451

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