NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism

The NOx storage mechanism on BaTi0.8Cu0.2O3 catalyst were studied using different techniques. The results obtained by XRD, ATR, TGA and XPS under NOx storage-regeneration conditions revealed that BaO generated on the catalyst by decomposition of Ba2TiO4 plays a key role in the NOx storage process. I...

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Autores: Albaladejo-Fuentes, Vicente, Sánchez Adsuar, María Salvadora, Anderson, James A., Illán Gómez, María José
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/180468
Acceso en línea:https://hdl.handle.net/2445/180468
Access Level:acceso abierto
Palabra clave:Nitrits
Nitrats
Catàlisi
Nitrites
Nitrates
Catalysis
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spelling NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible MechanismAlbaladejo-Fuentes, VicenteSánchez Adsuar, María SalvadoraAnderson, James A.Illán Gómez, María JoséNitritsNitratsCatàlisiNitritesNitratesCatalysisThe NOx storage mechanism on BaTi0.8Cu0.2O3 catalyst were studied using different techniques. The results obtained by XRD, ATR, TGA and XPS under NOx storage-regeneration conditions revealed that BaO generated on the catalyst by decomposition of Ba2TiO4 plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O2 and NO/N2 show that nitrites and nitrates are formed on the perovskite during the NOx storage process. Thus, it seems that, as for model NSR catalysts, the NOx storage on BaTi0.8Cu0.2O3 catalyst takes place by both "nitrite" and "nitrate" routes, with the main pathway being highly dependent on the temperature and the time on stream: (i) at T < 350 °C, NO adsorption leads to nitrites formation on the catalyst and (ii) at T > 350 °C, the catalyst activity for NO oxidation promotes NO2 generation and the nitrate formation.MDPI2021202120212021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion18 p.application/pdfhttps://hdl.handle.net/2445/180468Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3390/nano11082133Nanomaterials, 2021, vol. 11, num. 8, p. 2133https://doi.org/10.3390/nano11082133cc-by (c) Albaladejo-Fuentes, Vicente et al., 2021https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1804682026-05-29T05:05:01Z
dc.title.none.fl_str_mv NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
title NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
spellingShingle NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
Albaladejo-Fuentes, Vicente
Nitrits
Nitrats
Catàlisi
Nitrites
Nitrates
Catalysis
title_short NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
title_full NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
title_fullStr NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
title_full_unstemmed NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
title_sort NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
dc.creator.none.fl_str_mv Albaladejo-Fuentes, Vicente
Sánchez Adsuar, María Salvadora
Anderson, James A.
Illán Gómez, María José
author Albaladejo-Fuentes, Vicente
author_facet Albaladejo-Fuentes, Vicente
Sánchez Adsuar, María Salvadora
Anderson, James A.
Illán Gómez, María José
author_role author
author2 Sánchez Adsuar, María Salvadora
Anderson, James A.
Illán Gómez, María José
author2_role author
author
author
dc.subject.none.fl_str_mv Nitrits
Nitrats
Catàlisi
Nitrites
Nitrates
Catalysis
topic Nitrits
Nitrats
Catàlisi
Nitrites
Nitrates
Catalysis
description The NOx storage mechanism on BaTi0.8Cu0.2O3 catalyst were studied using different techniques. The results obtained by XRD, ATR, TGA and XPS under NOx storage-regeneration conditions revealed that BaO generated on the catalyst by decomposition of Ba2TiO4 plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O2 and NO/N2 show that nitrites and nitrates are formed on the perovskite during the NOx storage process. Thus, it seems that, as for model NSR catalysts, the NOx storage on BaTi0.8Cu0.2O3 catalyst takes place by both "nitrite" and "nitrate" routes, with the main pathway being highly dependent on the temperature and the time on stream: (i) at T < 350 °C, NO adsorption leads to nitrites formation on the catalyst and (ii) at T > 350 °C, the catalyst activity for NO oxidation promotes NO2 generation and the nitrate formation.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/180468
url https://hdl.handle.net/2445/180468
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/nano11082133
Nanomaterials, 2021, vol. 11, num. 8, p. 2133
https://doi.org/10.3390/nano11082133
dc.rights.none.fl_str_mv cc-by (c) Albaladejo-Fuentes, Vicente et al., 2021
https://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Albaladejo-Fuentes, Vicente et al., 2021
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 18 p.
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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