Kinetics of low-temperature CO oxidation on Au(111)

Autores
Thuening, Theodore; Walker, Joshua; Adams, Heather; Furlong, Octavio Javier; Tysoe, Wilfred T.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The oxidation of carbon monoxide on oxygen-modified Au(111) surfaces is studied using a combination of reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD). TPD reveals that CO desorbs in two states with the low-temperature state have a peak temperature between ~130 and 150 K, and the higher-temperature state having a peak temperature that varies from ~175 to ~220 K depending on the initial oxygen and CO coverages. Infrared spectroscopy indicates that the low-temperature CO desorption state is predominantly associated with CO adsorbed on Au δ+ sites, while the higher-temperature states are due to CO on Au0 sites. No additional vibrational features are detected indicating that CO reacts directly with adsorbed atomic oxygen on gold to form CO2. Estimates of the activation energy for CO2 formation suggest that they are in the same range and found for supported gold catalysts at reaction temperature below ~300 K.
Fil: Thuening, Theodore. University Of Wisconsin; Estados Unidos
Fil: Walker, Joshua. University Of Wisconsin; Estados Unidos
Fil: Adams, Heather. University Of Wisconsin; Estados Unidos
Fil: Furlong, Octavio Javier. Universidad Nacional de San Luis. Facultad de Ciencias Fisico- Matematicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina; Argentina
Fil: Tysoe, Wilfred T.. University Of Wisconsin; Estados Unidos
Materia
Au(111)
Oxygen
Carbon Dioxide
Temperature-Programmed Desorption
Reflection-Absorptpion Spectroscopy
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:11336/14609
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/14609
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinetics of low-temperature CO oxidation on Au(111)Thuening, TheodoreWalker, JoshuaAdams, HeatherFurlong, Octavio JavierTysoe, Wilfred T.Au(111)OxygenCarbon DioxideTemperature-Programmed DesorptionReflection-Absorptpion Spectroscopyhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The oxidation of carbon monoxide on oxygen-modified Au(111) surfaces is studied using a combination of reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD). TPD reveals that CO desorbs in two states with the low-temperature state have a peak temperature between ~130 and 150 K, and the higher-temperature state having a peak temperature that varies from ~175 to ~220 K depending on the initial oxygen and CO coverages. Infrared spectroscopy indicates that the low-temperature CO desorption state is predominantly associated with CO adsorbed on Au δ+ sites, while the higher-temperature states are due to CO on Au0 sites. No additional vibrational features are detected indicating that CO reacts directly with adsorbed atomic oxygen on gold to form CO2. Estimates of the activation energy for CO2 formation suggest that they are in the same range and found for supported gold catalysts at reaction temperature below ~300 K.Fil: Thuening, Theodore. University Of Wisconsin; Estados UnidosFil: Walker, Joshua. University Of Wisconsin; Estados UnidosFil: Adams, Heather. University Of Wisconsin; Estados UnidosFil: Furlong, Octavio Javier. Universidad Nacional de San Luis. Facultad de Ciencias Fisico- Matematicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina; ArgentinaFil: Tysoe, Wilfred T.. University Of Wisconsin; Estados UnidosElsevier Science2015-12-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/14609Thuening, Theodore; Walker, Joshua; Adams, Heather; Furlong, Octavio Javier; Tysoe, Wilfred T.; Kinetics of low-temperature CO oxidation on Au(111); Elsevier Science; Surface Science; 648; 22-12-2015; 236-2410039-6028enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.susc.2015.12.010info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0039602815004124info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:48:39Zoai:ri.conicet.gov.ar:11336/14609instacron: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 09:48:40.286CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinetics of low-temperature CO oxidation on Au(111)
title Kinetics of low-temperature CO oxidation on Au(111)
spellingShingle Kinetics of low-temperature CO oxidation on Au(111)
Thuening, Theodore
Au(111)
Oxygen
Carbon Dioxide
Temperature-Programmed Desorption
Reflection-Absorptpion Spectroscopy
title_short Kinetics of low-temperature CO oxidation on Au(111)
title_full Kinetics of low-temperature CO oxidation on Au(111)
title_fullStr Kinetics of low-temperature CO oxidation on Au(111)
title_full_unstemmed Kinetics of low-temperature CO oxidation on Au(111)
title_sort Kinetics of low-temperature CO oxidation on Au(111)
dc.creator.none.fl_str_mv Thuening, Theodore
Walker, Joshua
Adams, Heather
Furlong, Octavio Javier
Tysoe, Wilfred T.
author Thuening, Theodore
author_facet Thuening, Theodore
Walker, Joshua
Adams, Heather
Furlong, Octavio Javier
Tysoe, Wilfred T.
author_role author
author2 Walker, Joshua
Adams, Heather
Furlong, Octavio Javier
Tysoe, Wilfred T.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Au(111)
Oxygen
Carbon Dioxide
Temperature-Programmed Desorption
Reflection-Absorptpion Spectroscopy
topic Au(111)
Oxygen
Carbon Dioxide
Temperature-Programmed Desorption
Reflection-Absorptpion Spectroscopy
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 oxidation of carbon monoxide on oxygen-modified Au(111) surfaces is studied using a combination of reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD). TPD reveals that CO desorbs in two states with the low-temperature state have a peak temperature between ~130 and 150 K, and the higher-temperature state having a peak temperature that varies from ~175 to ~220 K depending on the initial oxygen and CO coverages. Infrared spectroscopy indicates that the low-temperature CO desorption state is predominantly associated with CO adsorbed on Au δ+ sites, while the higher-temperature states are due to CO on Au0 sites. No additional vibrational features are detected indicating that CO reacts directly with adsorbed atomic oxygen on gold to form CO2. Estimates of the activation energy for CO2 formation suggest that they are in the same range and found for supported gold catalysts at reaction temperature below ~300 K.
Fil: Thuening, Theodore. University Of Wisconsin; Estados Unidos
Fil: Walker, Joshua. University Of Wisconsin; Estados Unidos
Fil: Adams, Heather. University Of Wisconsin; Estados Unidos
Fil: Furlong, Octavio Javier. Universidad Nacional de San Luis. Facultad de Ciencias Fisico- Matematicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina; Argentina
Fil: Tysoe, Wilfred T.. University Of Wisconsin; Estados Unidos
description The oxidation of carbon monoxide on oxygen-modified Au(111) surfaces is studied using a combination of reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD). TPD reveals that CO desorbs in two states with the low-temperature state have a peak temperature between ~130 and 150 K, and the higher-temperature state having a peak temperature that varies from ~175 to ~220 K depending on the initial oxygen and CO coverages. Infrared spectroscopy indicates that the low-temperature CO desorption state is predominantly associated with CO adsorbed on Au δ+ sites, while the higher-temperature states are due to CO on Au0 sites. No additional vibrational features are detected indicating that CO reacts directly with adsorbed atomic oxygen on gold to form CO2. Estimates of the activation energy for CO2 formation suggest that they are in the same range and found for supported gold catalysts at reaction temperature below ~300 K.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-22
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/11336/14609
Thuening, Theodore; Walker, Joshua; Adams, Heather; Furlong, Octavio Javier; Tysoe, Wilfred T.; Kinetics of low-temperature CO oxidation on Au(111); Elsevier Science; Surface Science; 648; 22-12-2015; 236-241
0039-6028
url http://hdl.handle.net/11336/14609
identifier_str_mv Thuening, Theodore; Walker, Joshua; Adams, Heather; Furlong, Octavio Javier; Tysoe, Wilfred T.; Kinetics of low-temperature CO oxidation on Au(111); Elsevier Science; Surface Science; 648; 22-12-2015; 236-241
0039-6028
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.susc.2015.12.010
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0039602815004124
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
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
_version_ 1842268934342967296
score 13.13397

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