Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation

[EN] MnOX-CeO2 catalysts with different Mn and Ce content were prepared to evaluate the effect of metal content on catalytic properties and activity in the simultaneous NO reduction and o-DCB oxidation, in order to elucidate the most active species for the process. Catalytic properties were evaluate...

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Autores: Martín Martín, Juan Alberto, González Marcos, María Pilar, Aranzabal Maiztegi, Asier, González Velasco, Juan Ramón, Finocchio, Elisabetta
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/71637
Acceso en línea:http://hdl.handle.net/10810/71637
Access Level:acceso abierto
Palabra clave:Mn and Ce content
NO reduction
o-DCB oxidation
segregated Mn
mixed oxides
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oai_identifier_str oai:addi.ehu.eus:10810/71637
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
title Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
spellingShingle Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
Martín Martín, Juan Alberto
Mn and Ce content
NO reduction
o-DCB oxidation
segregated Mn
mixed oxides
title_short Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
title_full Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
title_fullStr Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
title_full_unstemmed Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
title_sort Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidation
dc.creator.none.fl_str_mv Martín Martín, Juan Alberto
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
Finocchio, Elisabetta
author Martín Martín, Juan Alberto
author_facet Martín Martín, Juan Alberto
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
Finocchio, Elisabetta
author_role author
author2 González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
Finocchio, Elisabetta
author2_role author
author
author
author
dc.subject.none.fl_str_mv Mn and Ce content
NO reduction
o-DCB oxidation
segregated Mn
mixed oxides
topic Mn and Ce content
NO reduction
o-DCB oxidation
segregated Mn
mixed oxides
description [EN] MnOX-CeO2 catalysts with different Mn and Ce content were prepared to evaluate the effect of metal content on catalytic properties and activity in the simultaneous NO reduction and o-DCB oxidation, in order to elucidate the most active species for the process. Catalytic properties were evaluated by ICP-AES, XRD, skeletal FTIR, STEM-HAADF, XPS, N2-physisorption, H2-TPR, NH3-TPD and pyridine-FTIR. Catalysts with 85%Mn and 15%Ce molar content have been found to be the most active. Their excellent catalytic performance is related to the coexistence of Mn in different phases, i.e., Mn species strongly interacting with Ce and segregated Mn species. The effect of the preparation methods has also been deeply investigated: Co-precipitation method (CP) leads to Mn segregation as Mn2O3, whereas sol-gel preparation method (SG) promotes the formation of an amorphous powder. The synergy between segregated Mn2O3 species and Mn species in high interaction with Ce (resulting in a mixed oxide phase) leads to the presence of Mn with different oxidation states. This effect, together with the high oxygen mobility caused by structural defects, enhances redox, acidic and oxidative properties. The improvement of catalytic properties with Mn content also favors NO reduction side-reactions, with N2O and NO2 being the most important by-products, whereas it limits the production of chlorinated organic by-products in o-DCB oxidation
publishDate 2024
dc.date.none.fl_str_mv 2024
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/71637
url http://hdl.handle.net/10810/71637
dc.language.none.fl_str_mv Italiano
language_invalid_str_mv Italiano
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MICINN/PID2019-107503RB-I00/
info:eu-repo/grantAgreement/MINECO/BES-2016-077849/
https://link.springer.com/article/10.1007/s11244-024-01995-9
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Promotion of different active phases in MnOX-CeO2 catalysts for simultaneous NO reduction and o-DCB oxidationMartín Martín, Juan AlbertoGonzález Marcos, María PilarAranzabal Maiztegi, AsierGonzález Velasco, Juan RamónFinocchio, ElisabettaMn and Ce contentNO reductiono-DCB oxidationsegregated Mnmixed oxides[EN] MnOX-CeO2 catalysts with different Mn and Ce content were prepared to evaluate the effect of metal content on catalytic properties and activity in the simultaneous NO reduction and o-DCB oxidation, in order to elucidate the most active species for the process. Catalytic properties were evaluated by ICP-AES, XRD, skeletal FTIR, STEM-HAADF, XPS, N2-physisorption, H2-TPR, NH3-TPD and pyridine-FTIR. Catalysts with 85%Mn and 15%Ce molar content have been found to be the most active. Their excellent catalytic performance is related to the coexistence of Mn in different phases, i.e., Mn species strongly interacting with Ce and segregated Mn species. The effect of the preparation methods has also been deeply investigated: Co-precipitation method (CP) leads to Mn segregation as Mn2O3, whereas sol-gel preparation method (SG) promotes the formation of an amorphous powder. The synergy between segregated Mn2O3 species and Mn species in high interaction with Ce (resulting in a mixed oxide phase) leads to the presence of Mn with different oxidation states. This effect, together with the high oxygen mobility caused by structural defects, enhances redox, acidic and oxidative properties. The improvement of catalytic properties with Mn content also favors NO reduction side-reactions, with N2O and NO2 being the most important by-products, whereas it limits the production of chlorinated organic by-products in o-DCB oxidation[ES] Se prepararon catalizadores MnOX-CeO2 con diferentes contenidos de Mn y Ce para evaluar el efecto del contenido metálico sobre las propiedades catalíticas y la actividad en la reducción simultánea de NO y la oxidación de o-DCB, con el fin de dilucidar las especies más activas para el proceso. Las propiedades catalíticas se evaluaron mediante ICP-AES, XRD, FTIR esquelético, STEM-HAADF, XPS, N2-fisorción, H2-TPR, NH3-TPD y piridina-FTIR. Los catalizadores con un contenido molar de 85% de Mn y 15% de Ce resultaron ser los más activos. Su excelente rendimiento catalítico está relacionado con la coexistencia de Mn en diferentes fases, es decir, especies de Mn que interactúan fuertemente con Ce y especies de Mn segregadas. También se ha investigado en profundidad el efecto de los métodos de preparación: El método de coprecipitación (CP) conduce a la segregación del Mn como Mn2O3, mientras que el método de preparación sol-gel (SG) promueve la formación de un polvo amorfo. La sinergia entre las especies de Mn2O3 segregadas y las especies de Mn en alta interacción con el Ce (dando lugar a una fase de óxido mixto) conduce a la presencia de Mn con diferentes estados de oxidación. Este efecto, junto con la elevada movilidad del oxígeno causada por los defectos estructurales, mejora las propiedades redox, ácidas y oxidativas. La mejora de las propiedades catalíticas con el contenido de Mn también favorece las reacciones colaterales de reducción de NO, siendo N2O y NO2 los subproductos más importantes, mientras que limita la producción de subproductos orgánicos clorados en la oxidación de o-DCB.Spanish Ministry for Science and Innovation (Project PID2019-107503RB-I00 by MCIN/AEI/https://doi.org/10.13039/501100011033) Basque Government (Project IT1509-2022). Spanish Ministry for Economy and Competitivity and European Union (MINECO/ERDF, BES-2016-077849) for the PhD grant.Springer Nature202520252024info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/71637reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoItalianoinfo:eu-repo/grantAgreement/MICINN/PID2019-107503RB-I00/info:eu-repo/grantAgreement/MINECO/BES-2016-077849/https://link.springer.com/article/10.1007/s11244-024-01995-9info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/© The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.oai:addi.ehu.eus:10810/716372026-06-18T09:23:17Z
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