New insights on the Cd UPD on Au(111)
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...
| Autores: | , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2008 |
| País: | Argentina |
| Recursos: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositório: | CONICET Digital (CONICET) |
| Idioma: | inglês |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/76520 |
| Acesso em linha: | http://hdl.handle.net/11336/76520 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Alloy Formation Au(111) Cd Upd In Situ Stm https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| id |
AR_bceabe9d764eecd2e4d1cf7973ba6cf5 |
|---|---|
| oai_identifier_str |
oai:ri.conicet.gov.ar:11336/76520 |
| network_acronym_str |
AR |
| network_name_str |
Argentina |
| repository_id_str |
|
| 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 Técnicas2024-05-08T14:20:00Zoai: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:34982024-05-08 14:20:01.147CONICET 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 https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| 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 https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| topic |
Alloy Formation Au(111) Cd Upd In Situ Stm https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| 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 |
| instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
| reponame_str |
CONICET Digital (CONICET) |
| collection |
CONICET Digital (CONICET) |
| 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 |
| _version_ |
1799196240309649408 |
| score |
15,81155 |