The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior

Autores
Rafti, Matías; Lovis, Florian; Imbihl, Ronald
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The kinetics of ammonia oxidation with oxygen over a Rh(110) surface were studied in the pressure range 10⁻⁵–10⁻⁴ mbar. Nitrogen was found to be the preferred product at low partial pressures ratios pO₂ : pNH₃, while the NO pathway was favored with oxygen rich gas mixtures and at high temperature. The reactive sticking coefficient of O₂ reaches up to 0.05 under steady state conditions. Pronounced hysteresis effects in the reaction rates were found in T-cycling experiments. Sustained oscillations in the reaction rates occurred under isothermal conditions at T = 620 K at a total pressure of 4 × 10⁻⁵ mbar.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Rhodium
NH3 + O2 reaction
Kinetic oscillations
Single crystal
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/139733
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/139733
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory BehaviorRafti, MatíasLovis, FlorianImbihl, RonaldQuímicaRhodiumNH3 + O2 reactionKinetic oscillationsSingle crystalThe kinetics of ammonia oxidation with oxygen over a Rh(110) surface were studied in the pressure range 10⁻⁵–10⁻⁴ mbar. Nitrogen was found to be the preferred product at low partial pressures ratios p<sub>O₂</sub> : p<sub>NH₃</sub>, while the NO pathway was favored with oxygen rich gas mixtures and at high temperature. The reactive sticking coefficient of O₂ reaches up to 0.05 under steady state conditions. Pronounced hysteresis effects in the reaction rates were found in T-cycling experiments. Sustained oscillations in the reaction rates occurred under isothermal conditions at T = 620 K at a total pressure of 4 × 10⁻⁵ mbar.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2012-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf16-21http://sedici.unlp.edu.ar/handle/10915/139733enginfo:eu-repo/semantics/altIdentifier/issn/1011-372Xinfo:eu-repo/semantics/altIdentifier/issn/1572-879Xinfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10562-011-0722-zinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:04:13Zoai:sedici.unlp.edu.ar:10915/139733Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:04:13.433SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
title The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
spellingShingle The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
Rafti, Matías
Química
Rhodium
NH3 + O2 reaction
Kinetic oscillations
Single crystal
title_short The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
title_full The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
title_fullStr The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
title_full_unstemmed The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
title_sort The O₂ + NH₃ Reaction Over Rh(110): Steady State Kinetics and Oscillatory Behavior
dc.creator.none.fl_str_mv Rafti, Matías
Lovis, Florian
Imbihl, Ronald
author Rafti, Matías
author_facet Rafti, Matías
Lovis, Florian
Imbihl, Ronald
author_role author
author2 Lovis, Florian
Imbihl, Ronald
author2_role author
author
dc.subject.none.fl_str_mv Química
Rhodium
NH3 + O2 reaction
Kinetic oscillations
Single crystal
topic Química
Rhodium
NH3 + O2 reaction
Kinetic oscillations
Single crystal
dc.description.none.fl_txt_mv The kinetics of ammonia oxidation with oxygen over a Rh(110) surface were studied in the pressure range 10⁻⁵–10⁻⁴ mbar. Nitrogen was found to be the preferred product at low partial pressures ratios p<sub>O₂</sub> : p<sub>NH₃</sub>, while the NO pathway was favored with oxygen rich gas mixtures and at high temperature. The reactive sticking coefficient of O₂ reaches up to 0.05 under steady state conditions. Pronounced hysteresis effects in the reaction rates were found in T-cycling experiments. Sustained oscillations in the reaction rates occurred under isothermal conditions at T = 620 K at a total pressure of 4 × 10⁻⁵ mbar.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The kinetics of ammonia oxidation with oxygen over a Rh(110) surface were studied in the pressure range 10⁻⁵–10⁻⁴ mbar. Nitrogen was found to be the preferred product at low partial pressures ratios p<sub>O₂</sub> : p<sub>NH₃</sub>, while the NO pathway was favored with oxygen rich gas mixtures and at high temperature. The reactive sticking coefficient of O₂ reaches up to 0.05 under steady state conditions. Pronounced hysteresis effects in the reaction rates were found in T-cycling experiments. Sustained oscillations in the reaction rates occurred under isothermal conditions at T = 620 K at a total pressure of 4 × 10⁻⁵ mbar.
publishDate 2012
dc.date.none.fl_str_mv 2012-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/139733
url http://sedici.unlp.edu.ar/handle/10915/139733
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1011-372X
info:eu-repo/semantics/altIdentifier/issn/1572-879X
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10562-011-0722-z
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
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instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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