New insights on the Cd UPD on Au(111)

Autores
del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Mayer, Carlos Enrique; Salinas, Daniel Ricardo
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Cd underpotential deposition (UPD) process on Au(111) was analyzed by means of combined electrochemical measurements and in situ scanning tunneling microscopy (STM). In the underpotential range 300 ≤ ΔE (mV) ≤400, 2D Cd islands are formed on the fcc regions of the Au(111)-(√3 × 22) reconstructed surface without lifting the reconstruction. At lower underpotentials, the 2D Cd islands grow and, simultaneously, new 2D islands nucleate and coalesce with the previous ones forming a complete condensed Cd monolayer (ML). STM images and long time polarization experiments performed at ΔE = 70 mV demonstrate the formation of an Au-Cd surface alloy. At ΔE = 10 mV, the formation of the complete Cd ML is accompanied by a significant Au-Cd surface alloying and the kinetic results reveal two different solid-state diffusion processes. The first one, with a diffusion coefficient D1 = 4 × 10-17 cm2 s -1, could be ascribed to the mutual diffusion of Au and Cd atoms through a highly distorted (vacancy-rich) Au-Cd alloy layer. The second and faster diffusion process (D2 = 7 × 10-16 cm2 s -1) is associated with the appearance of an additional peak in the anodic stripping curves and could be attributed to the formation of another CdzAux alloy phase.
Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Mayer, Carlos Enrique. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Salinas, Daniel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Materia
Alloy Formation
Au(111)
Cd Upd
In Situ Stm
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:11336/76520
Acceder
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network_name_str CONICET Digital (CONICET)
spelling New insights on the Cd UPD on Au(111)del Barrio, Maria CeciliaGarcia, Silvana GracielaMayer, Carlos EnriqueSalinas, Daniel RicardoAlloy FormationAu(111)Cd UpdIn Situ Stmhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The Cd underpotential deposition (UPD) process on Au(111) was analyzed by means of combined electrochemical measurements and in situ scanning tunneling microscopy (STM). In the underpotential range 300 ≤ ΔE (mV) ≤400, 2D Cd islands are formed on the fcc regions of the Au(111)-(√3 × 22) reconstructed surface without lifting the reconstruction. At lower underpotentials, the 2D Cd islands grow and, simultaneously, new 2D islands nucleate and coalesce with the previous ones forming a complete condensed Cd monolayer (ML). STM images and long time polarization experiments performed at ΔE = 70 mV demonstrate the formation of an Au-Cd surface alloy. At ΔE = 10 mV, the formation of the complete Cd ML is accompanied by a significant Au-Cd surface alloying and the kinetic results reveal two different solid-state diffusion processes. The first one, with a diffusion coefficient D1 = 4 × 10-17 cm2 s -1, could be ascribed to the mutual diffusion of Au and Cd atoms through a highly distorted (vacancy-rich) Au-Cd alloy layer. The second and faster diffusion process (D2 = 7 × 10-16 cm2 s -1) is associated with the appearance of an additional peak in the anodic stripping curves and could be attributed to the formation of another CdzAux alloy phase.Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaFil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaFil: Mayer, Carlos Enrique. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaFil: Salinas, Daniel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaJohn Wiley & Sons Ltd2008-01-11info: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/11336/76520del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Mayer, Carlos Enrique; Salinas, Daniel Ricardo; New insights on the Cd UPD on Au(111); John Wiley & Sons Ltd; Surface and Interface Analysis; 40; 1; 11-1-2008; 22-260142-24211096-9918CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/sia.2664info:eu-repo/semantics/altIdentifier/doi/10.1002/sia.2664info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:10Zoai:ri.conicet.gov.ar:11336/76520instacron: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 10:08:10.604CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New insights on the Cd UPD on Au(111)
title New insights on the Cd UPD on Au(111)
spellingShingle New insights on the Cd UPD on Au(111)
del Barrio, Maria Cecilia
Alloy Formation
Au(111)
Cd Upd
In Situ Stm
title_short New insights on the Cd UPD on Au(111)
title_full New insights on the Cd UPD on Au(111)
title_fullStr New insights on the Cd UPD on Au(111)
title_full_unstemmed New insights on the Cd UPD on Au(111)
title_sort New insights on the Cd UPD on Au(111)
dc.creator.none.fl_str_mv del Barrio, Maria Cecilia
Garcia, Silvana Graciela
Mayer, Carlos Enrique
Salinas, Daniel Ricardo
author del Barrio, Maria Cecilia
author_facet del Barrio, Maria Cecilia
Garcia, Silvana Graciela
Mayer, Carlos Enrique
Salinas, Daniel Ricardo
author_role author
author2 Garcia, Silvana Graciela
Mayer, Carlos Enrique
Salinas, Daniel Ricardo
author2_role author
author
author
dc.subject.none.fl_str_mv Alloy Formation
Au(111)
Cd Upd
In Situ Stm
topic Alloy Formation
Au(111)
Cd Upd
In Situ Stm
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The Cd underpotential deposition (UPD) process on Au(111) was analyzed by means of combined electrochemical measurements and in situ scanning tunneling microscopy (STM). In the underpotential range 300 ≤ ΔE (mV) ≤400, 2D Cd islands are formed on the fcc regions of the Au(111)-(√3 × 22) reconstructed surface without lifting the reconstruction. At lower underpotentials, the 2D Cd islands grow and, simultaneously, new 2D islands nucleate and coalesce with the previous ones forming a complete condensed Cd monolayer (ML). STM images and long time polarization experiments performed at ΔE = 70 mV demonstrate the formation of an Au-Cd surface alloy. At ΔE = 10 mV, the formation of the complete Cd ML is accompanied by a significant Au-Cd surface alloying and the kinetic results reveal two different solid-state diffusion processes. The first one, with a diffusion coefficient D1 = 4 × 10-17 cm2 s -1, could be ascribed to the mutual diffusion of Au and Cd atoms through a highly distorted (vacancy-rich) Au-Cd alloy layer. The second and faster diffusion process (D2 = 7 × 10-16 cm2 s -1) is associated with the appearance of an additional peak in the anodic stripping curves and could be attributed to the formation of another CdzAux alloy phase.
Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Mayer, Carlos Enrique. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Salinas, Daniel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
description The Cd underpotential deposition (UPD) process on Au(111) was analyzed by means of combined electrochemical measurements and in situ scanning tunneling microscopy (STM). In the underpotential range 300 ≤ ΔE (mV) ≤400, 2D Cd islands are formed on the fcc regions of the Au(111)-(√3 × 22) reconstructed surface without lifting the reconstruction. At lower underpotentials, the 2D Cd islands grow and, simultaneously, new 2D islands nucleate and coalesce with the previous ones forming a complete condensed Cd monolayer (ML). STM images and long time polarization experiments performed at ΔE = 70 mV demonstrate the formation of an Au-Cd surface alloy. At ΔE = 10 mV, the formation of the complete Cd ML is accompanied by a significant Au-Cd surface alloying and the kinetic results reveal two different solid-state diffusion processes. The first one, with a diffusion coefficient D1 = 4 × 10-17 cm2 s -1, could be ascribed to the mutual diffusion of Au and Cd atoms through a highly distorted (vacancy-rich) Au-Cd alloy layer. The second and faster diffusion process (D2 = 7 × 10-16 cm2 s -1) is associated with the appearance of an additional peak in the anodic stripping curves and could be attributed to the formation of another CdzAux alloy phase.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-11
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/11336/76520
del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Mayer, Carlos Enrique; Salinas, Daniel Ricardo; New insights on the Cd UPD on Au(111); John Wiley & Sons Ltd; Surface and Interface Analysis; 40; 1; 11-1-2008; 22-26
0142-2421
1096-9918
CONICET Digital
CONICET
url http://hdl.handle.net/11336/76520
identifier_str_mv del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Mayer, Carlos Enrique; Salinas, Daniel Ricardo; New insights on the Cd UPD on Au(111); John Wiley & Sons Ltd; Surface and Interface Analysis; 40; 1; 11-1-2008; 22-26
0142-2421
1096-9918
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://onlinelibrary.wiley.com/doi/abs/10.1002/sia.2664
info:eu-repo/semantics/altIdentifier/doi/10.1002/sia.2664
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 John Wiley & Sons Ltd
publisher.none.fl_str_mv John Wiley & Sons Ltd
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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