The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction

Autores
Pereyra, V. D.; Albano, Ezequiel Vicente
Año de publicación
1993
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
“Hot” dimers are molecules which after adsorption dissociate and each of the remaining “hot” monomers fly apart up to a maximum distance R from the original adsorption site. The influence of the “hot”-dimer adsorption mechanism on relevant aspects of the bimolecular catalyzed reaction of the type A − (1/2)B2(“hot”) → AB is studied by means of the Monte-Carlo simulation technique. The temporal evolution of both the reactant's coverages as well as the rate of AB-production is evaluated and discussed. Due to the enhanced probability of “hot” species for encounters with other adsorbed particles, the rate of AB-production becomes faster when increasing R. This behavior may be relevant in the dynamic of some catalyzed reactions such as for example the oxidation of carbon monoxide on transition metal surfaces, i.e. A≡CO, B2≡O2, and AB≡CO2. Also the sticking coefficient of “hot” dimers and the average distance traveled by the “hot” monomers are evaluated and discussed.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Chemical kinetics and dynamics
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/134993
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/134993
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network_name_str SEDICI (UNLP)
spelling The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reactionPereyra, V. D.Albano, Ezequiel VicenteQuímicaChemical kinetics and dynamics“Hot” dimers are molecules which after adsorption dissociate and each of the remaining “hot” monomers fly apart up to a maximum distance R from the original adsorption site. The influence of the “hot”-dimer adsorption mechanism on relevant aspects of the bimolecular catalyzed reaction of the type A − (1/2)B2(“hot”) → AB is studied by means of the Monte-Carlo simulation technique. The temporal evolution of both the reactant's coverages as well as the rate of AB-production is evaluated and discussed. Due to the enhanced probability of “hot” species for encounters with other adsorbed particles, the rate of AB-production becomes faster when increasing R. This behavior may be relevant in the dynamic of some catalyzed reactions such as for example the oxidation of carbon monoxide on transition metal surfaces, i.e. A≡CO, B2≡O2, and AB≡CO2. Also the sticking coefficient of “hot” dimers and the average distance traveled by the “hot” monomers are evaluated and discussed.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf291-298http://sedici.unlp.edu.ar/handle/10915/134993enginfo:eu-repo/semantics/altIdentifier/issn/0721-7250info:eu-repo/semantics/altIdentifier/issn/1432-0630info:eu-repo/semantics/altIdentifier/issn/1996-0948info:eu-repo/semantics/altIdentifier/issn/0947-8396info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00332605info: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:UNLP2025-10-22T17:13:31Zoai:sedici.unlp.edu.ar:10915/134993Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:13:32.248SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
title The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
spellingShingle The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
Pereyra, V. D.
Química
Chemical kinetics and dynamics
title_short The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
title_full The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
title_fullStr The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
title_full_unstemmed The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
title_sort The influence of the “hot”-dimer adsorption mechanism on the kinetics of a monomer-dimer surface reaction
dc.creator.none.fl_str_mv Pereyra, V. D.
Albano, Ezequiel Vicente
author Pereyra, V. D.
author_facet Pereyra, V. D.
Albano, Ezequiel Vicente
author_role author
author2 Albano, Ezequiel Vicente
author2_role author
dc.subject.none.fl_str_mv Química
Chemical kinetics and dynamics
topic Química
Chemical kinetics and dynamics
dc.description.none.fl_txt_mv “Hot” dimers are molecules which after adsorption dissociate and each of the remaining “hot” monomers fly apart up to a maximum distance R from the original adsorption site. The influence of the “hot”-dimer adsorption mechanism on relevant aspects of the bimolecular catalyzed reaction of the type A − (1/2)B2(“hot”) → AB is studied by means of the Monte-Carlo simulation technique. The temporal evolution of both the reactant's coverages as well as the rate of AB-production is evaluated and discussed. Due to the enhanced probability of “hot” species for encounters with other adsorbed particles, the rate of AB-production becomes faster when increasing R. This behavior may be relevant in the dynamic of some catalyzed reactions such as for example the oxidation of carbon monoxide on transition metal surfaces, i.e. A≡CO, B2≡O2, and AB≡CO2. Also the sticking coefficient of “hot” dimers and the average distance traveled by the “hot” monomers are evaluated and discussed.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description “Hot” dimers are molecules which after adsorption dissociate and each of the remaining “hot” monomers fly apart up to a maximum distance R from the original adsorption site. The influence of the “hot”-dimer adsorption mechanism on relevant aspects of the bimolecular catalyzed reaction of the type A − (1/2)B2(“hot”) → AB is studied by means of the Monte-Carlo simulation technique. The temporal evolution of both the reactant's coverages as well as the rate of AB-production is evaluated and discussed. Due to the enhanced probability of “hot” species for encounters with other adsorbed particles, the rate of AB-production becomes faster when increasing R. This behavior may be relevant in the dynamic of some catalyzed reactions such as for example the oxidation of carbon monoxide on transition metal surfaces, i.e. A≡CO, B2≡O2, and AB≡CO2. Also the sticking coefficient of “hot” dimers and the average distance traveled by the “hot” monomers are evaluated and discussed.
publishDate 1993
dc.date.none.fl_str_mv 1993
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/10915/134993
url http://sedici.unlp.edu.ar/handle/10915/134993
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0721-7250
info:eu-repo/semantics/altIdentifier/issn/1432-0630
info:eu-repo/semantics/altIdentifier/issn/1996-0948
info:eu-repo/semantics/altIdentifier/issn/0947-8396
info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00332605
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
291-298
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution 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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