Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction

Autores
Gómez, Leticia Ester; Miro, Eduardo Ernesto; Boix, Alicia Viviana
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Mn-Co-Ce mixed oxides are active and selective catalysts for the CO preferential oxidation (COPROX), which is a promising process for the purification of hydrogen streams. In this work, we report a careful spectroscopic characterization of the said system, with the aim of relating its physical chemistry properties to the catalytic behavior. In all the Co-Mn-Ce samples, we detected the formation of partially developed (Mn,Co)3O4 mixed spinels. The presence of these species, which can be reduced during the TPR experiments at an intermediate temperature range (300-600°C), was also suggested by XRD and LRS. XPS results show that in all cases the catalytic surface is enriched in Mn, while the opposite occurs for Co. As regards the catalytic activity, we observed that the best formulations were those containing intermediate Mn/Co ratios (1/4 and 1/1), which can be ascribed to the promoting effect of Mn in improving the redox properties of Co active sites and provoking an increase in surface area. The best catalyst, which has a Mn/Co ratio of 1/4, was very stable after 75 h of time-on-stream with CO2 included in the feed.
Fil: Gómez, Leticia Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
Fil: Boix, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
Materia
Mn-Co-Ce Mixed Oxides
Coprox
Xps
Raman
Co2 Tolerance
Hydrogen
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/948
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/948
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reactionGómez, Leticia EsterMiro, Eduardo ErnestoBoix, Alicia VivianaMn-Co-Ce Mixed OxidesCoproxXpsRamanCo2 ToleranceHydrogenhttps://purl.org/becyt/ford/2https://purl.org/becyt/ford/2.4Mn-Co-Ce mixed oxides are active and selective catalysts for the CO preferential oxidation (COPROX), which is a promising process for the purification of hydrogen streams. In this work, we report a careful spectroscopic characterization of the said system, with the aim of relating its physical chemistry properties to the catalytic behavior. In all the Co-Mn-Ce samples, we detected the formation of partially developed (Mn,Co)3O4 mixed spinels. The presence of these species, which can be reduced during the TPR experiments at an intermediate temperature range (300-600°C), was also suggested by XRD and LRS. XPS results show that in all cases the catalytic surface is enriched in Mn, while the opposite occurs for Co. As regards the catalytic activity, we observed that the best formulations were those containing intermediate Mn/Co ratios (1/4 and 1/1), which can be ascribed to the promoting effect of Mn in improving the redox properties of Co active sites and provoking an increase in surface area. The best catalyst, which has a Mn/Co ratio of 1/4, was very stable after 75 h of time-on-stream with CO2 included in the feed.Fil: Gómez, Leticia Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;Fil: Boix, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;Pergamon-elsevier Science Ltd2013-03-29info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/948Gómez, Leticia Ester; Miro, Eduardo Ernesto; Boix, Alicia Viviana; Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction; Pergamon-elsevier Science Ltd; International Journal Of Hydrogen Energy; 38; 29-3-2013; 5645-56540360-3199enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2013.03.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T10:59:48Zoai:ri.conicet.gov.ar:11336/948instacron: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:34982025-09-17 10:59:48.471CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
title Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
spellingShingle Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
Gómez, Leticia Ester
Mn-Co-Ce Mixed Oxides
Coprox
Xps
Raman
Co2 Tolerance
Hydrogen
title_short Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
title_full Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
title_fullStr Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
title_full_unstemmed Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
title_sort Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
dc.creator.none.fl_str_mv Gómez, Leticia Ester
Miro, Eduardo Ernesto
Boix, Alicia Viviana
author Gómez, Leticia Ester
author_facet Gómez, Leticia Ester
Miro, Eduardo Ernesto
Boix, Alicia Viviana
author_role author
author2 Miro, Eduardo Ernesto
Boix, Alicia Viviana
author2_role author
author
dc.subject.none.fl_str_mv Mn-Co-Ce Mixed Oxides
Coprox
Xps
Raman
Co2 Tolerance
Hydrogen
topic Mn-Co-Ce Mixed Oxides
Coprox
Xps
Raman
Co2 Tolerance
Hydrogen
purl_subject.fl_str_mv https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/2.4
dc.description.none.fl_txt_mv Mn-Co-Ce mixed oxides are active and selective catalysts for the CO preferential oxidation (COPROX), which is a promising process for the purification of hydrogen streams. In this work, we report a careful spectroscopic characterization of the said system, with the aim of relating its physical chemistry properties to the catalytic behavior. In all the Co-Mn-Ce samples, we detected the formation of partially developed (Mn,Co)3O4 mixed spinels. The presence of these species, which can be reduced during the TPR experiments at an intermediate temperature range (300-600°C), was also suggested by XRD and LRS. XPS results show that in all cases the catalytic surface is enriched in Mn, while the opposite occurs for Co. As regards the catalytic activity, we observed that the best formulations were those containing intermediate Mn/Co ratios (1/4 and 1/1), which can be ascribed to the promoting effect of Mn in improving the redox properties of Co active sites and provoking an increase in surface area. The best catalyst, which has a Mn/Co ratio of 1/4, was very stable after 75 h of time-on-stream with CO2 included in the feed.
Fil: Gómez, Leticia Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
Fil: Boix, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET -Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica; Argentina;
description Mn-Co-Ce mixed oxides are active and selective catalysts for the CO preferential oxidation (COPROX), which is a promising process for the purification of hydrogen streams. In this work, we report a careful spectroscopic characterization of the said system, with the aim of relating its physical chemistry properties to the catalytic behavior. In all the Co-Mn-Ce samples, we detected the formation of partially developed (Mn,Co)3O4 mixed spinels. The presence of these species, which can be reduced during the TPR experiments at an intermediate temperature range (300-600°C), was also suggested by XRD and LRS. XPS results show that in all cases the catalytic surface is enriched in Mn, while the opposite occurs for Co. As regards the catalytic activity, we observed that the best formulations were those containing intermediate Mn/Co ratios (1/4 and 1/1), which can be ascribed to the promoting effect of Mn in improving the redox properties of Co active sites and provoking an increase in surface area. The best catalyst, which has a Mn/Co ratio of 1/4, was very stable after 75 h of time-on-stream with CO2 included in the feed.
publishDate 2013
dc.date.none.fl_str_mv 2013-03-29
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/11336/948
Gómez, Leticia Ester; Miro, Eduardo Ernesto; Boix, Alicia Viviana; Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction; Pergamon-elsevier Science Ltd; International Journal Of Hydrogen Energy; 38; 29-3-2013; 5645-5654
0360-3199
url http://hdl.handle.net/11336/948
identifier_str_mv Gómez, Leticia Ester; Miro, Eduardo Ernesto; Boix, Alicia Viviana; Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction; Pergamon-elsevier Science Ltd; International Journal Of Hydrogen Energy; 38; 29-3-2013; 5645-5654
0360-3199
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2013.03.004
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-elsevier Science Ltd
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
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score 13.001348

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