Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction

The effect of alkali promotion (Li, Na, K and Cs) on the CO preferential oxidation (CO PROX) reaction has been studied over Cu-CeO2 catalyst supported on carbon nanotubes (CNT). The catalysts were prepared with 2.5 wt.% Cu and 20 wt.% CeO2 loadings, and alkali/Cu atomic ratios of 0.68. The catalytic...

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Detalles Bibliográficos
Autores: Dongil, Ana Belén, Bachiller-Baeza, B., Castillejos-López, Eva, Escalona, Néstor, Guerrero Ruíz, A.R., Rodríguez-Ramos, Inmaculada
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/376199
Acceso en línea:http://hdl.handle.net/10261/376199
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016614957&doi=10.1016%2fj.cattod.2017.03.033&partnerID=40&md5=2420d1953aca814293d83041ad58d3eb
Access Level:acceso abierto
Palabra clave:Alkali
Carbon nanotubes
CO-PROX
CuO_CeO2
Promoter
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spelling Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reactionDongil, Ana BelénBachiller-Baeza, B.Castillejos-López, EvaEscalona, NéstorGuerrero Ruíz, A.R.Rodríguez-Ramos, InmaculadaAlkaliCarbon nanotubesCO-PROXCuO_CeO2PromoterThe effect of alkali promotion (Li, Na, K and Cs) on the CO preferential oxidation (CO PROX) reaction has been studied over Cu-CeO2 catalyst supported on carbon nanotubes (CNT). The catalysts were prepared with 2.5 wt.% Cu and 20 wt.% CeO2 loadings, and alkali/Cu atomic ratios of 0.68. The catalytic performance and the characterization by powder X-ray diffraction (XRD), TEM-STEM, H2-temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) has been presented. TEM and XRD analyses showed that the addition of alkali reduces the size of ceria crystallites. It was found that in general the incorporation of alkali favored the conversion of CO at low temperatures, being more pronounced for the K-doped catalyst. The characterization showed that the addition of K favored the Cu-CeO2 interaction, the activity of the catalyst was enhanced and the opposite was observed for Cs-doped sample. The characterization results reveal that the observed increase in the Cu+ species proportion and in lattice oxygen are related to the better catalytic performance. © 2017 Elsevier B.V.Financial support of the Spanish MINECO for Projects CTQ2014- 52956-C3-2-R and CTQ2014-52956-C3-3-R is recognized. The CONICYT-Chile is thanked for FONDECYT project 3130483.Peer reviewedElsevier BVConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/376199https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016614957&doi=10.1016%2fj.cattod.2017.03.033&partnerID=40&md5=2420d1953aca814293d83041ad58d3ebreponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCatalysis Todayhttp://dx.doi.org/10.1016/j.cattod.2017.03.033Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3761992026-05-22T06:33:51Z
dc.title.none.fl_str_mv Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
title Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
spellingShingle Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
Dongil, Ana Belén
Alkali
Carbon nanotubes
CO-PROX
CuO_CeO2
Promoter
title_short Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
title_full Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
title_fullStr Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
title_full_unstemmed Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
title_sort Promoter effect of alkalis on CuO/CeO2/carbon nanotubes systems for the PROx reaction
dc.creator.none.fl_str_mv Dongil, Ana Belén
Bachiller-Baeza, B.
Castillejos-López, Eva
Escalona, Néstor
Guerrero Ruíz, A.R.
Rodríguez-Ramos, Inmaculada
author Dongil, Ana Belén
author_facet Dongil, Ana Belén
Bachiller-Baeza, B.
Castillejos-López, Eva
Escalona, Néstor
Guerrero Ruíz, A.R.
Rodríguez-Ramos, Inmaculada
author_role author
author2 Bachiller-Baeza, B.
Castillejos-López, Eva
Escalona, Néstor
Guerrero Ruíz, A.R.
Rodríguez-Ramos, Inmaculada
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Alkali
Carbon nanotubes
CO-PROX
CuO_CeO2
Promoter
topic Alkali
Carbon nanotubes
CO-PROX
CuO_CeO2
Promoter
description The effect of alkali promotion (Li, Na, K and Cs) on the CO preferential oxidation (CO PROX) reaction has been studied over Cu-CeO2 catalyst supported on carbon nanotubes (CNT). The catalysts were prepared with 2.5 wt.% Cu and 20 wt.% CeO2 loadings, and alkali/Cu atomic ratios of 0.68. The catalytic performance and the characterization by powder X-ray diffraction (XRD), TEM-STEM, H2-temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) has been presented. TEM and XRD analyses showed that the addition of alkali reduces the size of ceria crystallites. It was found that in general the incorporation of alkali favored the conversion of CO at low temperatures, being more pronounced for the K-doped catalyst. The characterization showed that the addition of K favored the Cu-CeO2 interaction, the activity of the catalyst was enhanced and the opposite was observed for Cs-doped sample. The characterization results reveal that the observed increase in the Cu+ species proportion and in lattice oxygen are related to the better catalytic performance. © 2017 Elsevier B.V.
publishDate 2018
dc.date.none.fl_str_mv 2018
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/376199
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016614957&doi=10.1016%2fj.cattod.2017.03.033&partnerID=40&md5=2420d1953aca814293d83041ad58d3eb
url http://hdl.handle.net/10261/376199
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016614957&doi=10.1016%2fj.cattod.2017.03.033&partnerID=40&md5=2420d1953aca814293d83041ad58d3eb
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Catalysis Today
http://dx.doi.org/10.1016/j.cattod.2017.03.033
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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