Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction

Autores
Salim Rosales, Claudia Beatríz; Rojas, Mariana Isabel; Avalle, Lucia Bernardita
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The influence of the geometry of the silver crystalline faces (111) and (100) on the adsorption/desorption processes of phosphate species as a function of potential is studied, and the surface coverages (θ) and the relaxation times (τ) are compared. A reversible process was observed for Ag(hkl)/KH2PO4 systems from j−V profiles, where a value of 0.07 ML was obtained. For Ag(111)/H3PO4, a coverage of about 0.024 ML was calculated from anodic/cathodic j−V profiles. In the case of Ag(hkl)/K3PO4 systems, highly irreversible processes were observed, resulting in different charge values from integration of anodic/cathodic peaks. For these systems, the capacitance (C(ϕ)) plots are well differentiated for the two faces, and co-adsorption of OH− was evaluated from resistance parameters. Characteristic face-specific relaxation times are obtained for each electrode by Electrochemical Impedance Spectroscopy (EIS). In addition, it was found that the onset potential of her for Ag(111) at pH=1.6 was about 100 mV more negative compared to Ag(100).
Fil: Salim Rosales, Claudia Beatríz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Rojas, Mariana Isabel. 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 Química Teórica y Computacional; Argentina
Fil: Avalle, Lucia Bernardita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Materia
ADSORPTION
ONSET POTENTIAL OF HER
PHOSPHATES
RELAXATION TIME
SILVER
SINGLE CRYSTALS
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:11336/172551
Acceder
id CONICETDig_c34fc99366e9c75804c1a8eeae6f5552
oai_identifier_str oai:ri.conicet.gov.ar:11336/172551
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reactionSalim Rosales, Claudia BeatrízRojas, Mariana IsabelAvalle, Lucia BernarditaADSORPTIONONSET POTENTIAL OF HERPHOSPHATESRELAXATION TIMESILVERSINGLE CRYSTALShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The influence of the geometry of the silver crystalline faces (111) and (100) on the adsorption/desorption processes of phosphate species as a function of potential is studied, and the surface coverages (θ) and the relaxation times (τ) are compared. A reversible process was observed for Ag(hkl)/KH2PO4 systems from j−V profiles, where a value of 0.07 ML was obtained. For Ag(111)/H3PO4, a coverage of about 0.024 ML was calculated from anodic/cathodic j−V profiles. In the case of Ag(hkl)/K3PO4 systems, highly irreversible processes were observed, resulting in different charge values from integration of anodic/cathodic peaks. For these systems, the capacitance (C(ϕ)) plots are well differentiated for the two faces, and co-adsorption of OH− was evaluated from resistance parameters. Characteristic face-specific relaxation times are obtained for each electrode by Electrochemical Impedance Spectroscopy (EIS). In addition, it was found that the onset potential of her for Ag(111) at pH=1.6 was about 100 mV more negative compared to Ag(100).Fil: Salim Rosales, Claudia Beatríz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Rojas, Mariana Isabel. 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 Química Teórica y Computacional; ArgentinaFil: Avalle, Lucia Bernardita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaElsevier Science2021-03info: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/11336/172551Salim Rosales, Claudia Beatríz; Rojas, Mariana Isabel; Avalle, Lucia Bernardita; Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction; Elsevier Science; Applied Surface Science Advances; 3; 100041; 3-2021; 1-312666-5239CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S266652392030026Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsadv.2020.100041info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2008.00370info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:19:17Zoai:ri.conicet.gov.ar:11336/172551instacron: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:34982025-09-10 13:19:17.545CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
title Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
spellingShingle Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
Salim Rosales, Claudia Beatríz
ADSORPTION
ONSET POTENTIAL OF HER
PHOSPHATES
RELAXATION TIME
SILVER
SINGLE CRYSTALS
title_short Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
title_full Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
title_fullStr Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
title_full_unstemmed Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
title_sort Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction
dc.creator.none.fl_str_mv Salim Rosales, Claudia Beatríz
Rojas, Mariana Isabel
Avalle, Lucia Bernardita
author Salim Rosales, Claudia Beatríz
author_facet Salim Rosales, Claudia Beatríz
Rojas, Mariana Isabel
Avalle, Lucia Bernardita
author_role author
author2 Rojas, Mariana Isabel
Avalle, Lucia Bernardita
author2_role author
author
dc.subject.none.fl_str_mv ADSORPTION
ONSET POTENTIAL OF HER
PHOSPHATES
RELAXATION TIME
SILVER
SINGLE CRYSTALS
topic ADSORPTION
ONSET POTENTIAL OF HER
PHOSPHATES
RELAXATION TIME
SILVER
SINGLE CRYSTALS
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 influence of the geometry of the silver crystalline faces (111) and (100) on the adsorption/desorption processes of phosphate species as a function of potential is studied, and the surface coverages (θ) and the relaxation times (τ) are compared. A reversible process was observed for Ag(hkl)/KH2PO4 systems from j−V profiles, where a value of 0.07 ML was obtained. For Ag(111)/H3PO4, a coverage of about 0.024 ML was calculated from anodic/cathodic j−V profiles. In the case of Ag(hkl)/K3PO4 systems, highly irreversible processes were observed, resulting in different charge values from integration of anodic/cathodic peaks. For these systems, the capacitance (C(ϕ)) plots are well differentiated for the two faces, and co-adsorption of OH− was evaluated from resistance parameters. Characteristic face-specific relaxation times are obtained for each electrode by Electrochemical Impedance Spectroscopy (EIS). In addition, it was found that the onset potential of her for Ag(111) at pH=1.6 was about 100 mV more negative compared to Ag(100).
Fil: Salim Rosales, Claudia Beatríz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Rojas, Mariana Isabel. 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 Química Teórica y Computacional; Argentina
Fil: Avalle, Lucia Bernardita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
description The influence of the geometry of the silver crystalline faces (111) and (100) on the adsorption/desorption processes of phosphate species as a function of potential is studied, and the surface coverages (θ) and the relaxation times (τ) are compared. A reversible process was observed for Ag(hkl)/KH2PO4 systems from j−V profiles, where a value of 0.07 ML was obtained. For Ag(111)/H3PO4, a coverage of about 0.024 ML was calculated from anodic/cathodic j−V profiles. In the case of Ag(hkl)/K3PO4 systems, highly irreversible processes were observed, resulting in different charge values from integration of anodic/cathodic peaks. For these systems, the capacitance (C(ϕ)) plots are well differentiated for the two faces, and co-adsorption of OH− was evaluated from resistance parameters. Characteristic face-specific relaxation times are obtained for each electrode by Electrochemical Impedance Spectroscopy (EIS). In addition, it was found that the onset potential of her for Ag(111) at pH=1.6 was about 100 mV more negative compared to Ag(100).
publishDate 2021
dc.date.none.fl_str_mv 2021-03
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/11336/172551
Salim Rosales, Claudia Beatríz; Rojas, Mariana Isabel; Avalle, Lucia Bernardita; Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction; Elsevier Science; Applied Surface Science Advances; 3; 100041; 3-2021; 1-31
2666-5239
CONICET Digital
CONICET
url http://hdl.handle.net/11336/172551
identifier_str_mv Salim Rosales, Claudia Beatríz; Rojas, Mariana Isabel; Avalle, Lucia Bernardita; Specific adsorption of phosphate species on Ag (111) and Ag (100) electrodes and their effect at low overpotentials of the hydrogen evolution reaction; Elsevier Science; Applied Surface Science Advances; 3; 100041; 3-2021; 1-31
2666-5239
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/S266652392030026X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsadv.2020.100041
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2008.00370
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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 12.48226

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