New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes

Sulfur adsorption on gold surfaces has been extensively studied because of the key role of sulfur species in heterogeneous catalysis, and, more recently, due to the interest in the synthesis of anisotropic gold nanoparticles with potential applications in medicine that involves sulfide reduction. He...

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Detalhes bibliográficos
Autores: Carro, Pilar, Andreasen, Gustavo, Vericat, Carolina, Vela, María Elena, Salvarezza, Roberto Carlos
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:Argentina
Recursos:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/125106
Acesso em linha:http://sedici.unlp.edu.ar/handle/10915/125106
Access Level:acceso abierto
Palavra-chave:Ciencias Exactas
Química
Física
Gold
Sulfur adsorption
Surface structures
Gold‑sulfur complexes
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spelling New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexesCarro, PilarAndreasen, GustavoVericat, CarolinaVela, María ElenaSalvarezza, Roberto CarlosCiencias ExactasQuímicaFísicaGoldSulfur adsorptionSurface structuresGold‑sulfur complexesSulfur adsorption on gold surfaces has been extensively studied because of the key role of sulfur species in heterogeneous catalysis, and, more recently, due to the interest in the synthesis of anisotropic gold nanoparticles with potential applications in medicine that involves sulfide reduction. Here we report new surface structures for sulfur on Au(111) by combining in situ scanning tunneling microscopy in aqueous sodium sulfide solutions and density functional theory calculations. Our results show two related lattices, (3√3 × 3√3) R30° (θ = 0.22) and (√7 × √7) R19.1° (θ = 0.57), that involve AuS3 complexes as building blocks. Gold‑sulfur complexes are formed by the lifting of gold atoms from the substrate surface as revealed by density functional theory calculations. These species, intermediate between adsorbed S in the well-known (√3 × √3)-R30○ lattice and adsorbed polysulfides in organized rectangular structures, explain the surface coverage of gold vacancy islands, a fingerprint of S adsorption on Au(111).Facultad de Ciencias ExactasInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2019-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf848-856http://sedici.unlp.edu.ar/handle/10915/125106enginfo:eu-repo/semantics/altIdentifier/issn/0169-4332info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2019.05.167info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:07:59Zoai:sedici.unlp.edu.ar:10915/125106Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:07:59.587SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
title New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
spellingShingle New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
Carro, Pilar
Ciencias Exactas
Química
Física
Gold
Sulfur adsorption
Surface structures
Gold‑sulfur complexes
title_short New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
title_full New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
title_fullStr New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
title_full_unstemmed New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
title_sort New aspects of the surface chemistry of sulfur on Au(111): Surface structures formed by gold-sulfur complexes
dc.creator.none.fl_str_mv Carro, Pilar
Andreasen, Gustavo
Vericat, Carolina
Vela, María Elena
Salvarezza, Roberto Carlos
author Carro, Pilar
author_facet Carro, Pilar
Andreasen, Gustavo
Vericat, Carolina
Vela, María Elena
Salvarezza, Roberto Carlos
author_role author
author2 Andreasen, Gustavo
Vericat, Carolina
Vela, María Elena
Salvarezza, Roberto Carlos
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Física
Gold
Sulfur adsorption
Surface structures
Gold‑sulfur complexes
topic Ciencias Exactas
Química
Física
Gold
Sulfur adsorption
Surface structures
Gold‑sulfur complexes
description Sulfur adsorption on gold surfaces has been extensively studied because of the key role of sulfur species in heterogeneous catalysis, and, more recently, due to the interest in the synthesis of anisotropic gold nanoparticles with potential applications in medicine that involves sulfide reduction. Here we report new surface structures for sulfur on Au(111) by combining in situ scanning tunneling microscopy in aqueous sodium sulfide solutions and density functional theory calculations. Our results show two related lattices, (3√3 × 3√3) R30° (θ = 0.22) and (√7 × √7) R19.1° (θ = 0.57), that involve AuS3 complexes as building blocks. Gold‑sulfur complexes are formed by the lifting of gold atoms from the substrate surface as revealed by density functional theory calculations. These species, intermediate between adsorbed S in the well-known (√3 × √3)-R30○ lattice and adsorbed polysulfides in organized rectangular structures, explain the surface coverage of gold vacancy islands, a fingerprint of S adsorption on Au(111).
publishDate 2019
dc.date.none.fl_str_mv 2019-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/125106
url http://sedici.unlp.edu.ar/handle/10915/125106
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0169-4332
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2019.05.167
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
848-856
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 15,811543

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