Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)

12 Figures, 2 Tables.-- Datos suplementarios disponibles en línea en la página web del editor.-- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Detalles Bibliográficos
Autores: Schick, Lukas, Sanchis, Rut, González-Alfaro, Vicenta, Agouram, Saïd, López Sebastián, José Manuel, Torrente-Murciano, Laura, García Martínez, Tomás, Solsona, Benjamín
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/183775
Acceso en línea:http://hdl.handle.net/10261/183775
Access Level:acceso abierto
Palabra clave:Iridium
Silica
VOC
Short chain alkanes
Total oxidation
Size-activity relationship
id ES_76686aac0b9e61663d867cdff2e05ccd
oai_identifier_str oai:digital.csic.es:10261/183775
network_acronym_str ES
network_name_str España
repository_id_str
spelling Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)Schick, LukasSanchis, RutGonzález-Alfaro, VicentaAgouram, SaïdLópez Sebastián, José ManuelTorrente-Murciano, LauraGarcía Martínez, TomásSolsona, BenjamínIridiumSilicaVOCShort chain alkanesTotal oxidationSize-activity relationship12 Figures, 2 Tables.-- Datos suplementarios disponibles en línea en la página web del editor.-- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/This systematic catalytic study reveals for the first time a strong size-activity relationship of iridium-based catalysts for the total oxidation of short chain alkanes reaction. Silica has been selected as support for its inertness and weak silica-iridium interaction to avoid its contribution to the catalytic activity. The size of the iridium particles can be increased from ∼5 to 27 nm by increasing the calcination temperature from 350 to 750 °C. Unlike other precious metals such as palladium or platinum, in the case of iridium catalysts, the oxidation activity increases when the size decreases. This effect is also maintained when the activity is normalized per metallic surface area revealing a higher intrinsic activity as the iridium size decreases beyond its simple increase in metallic surface area. Indeed, as the particle size decreases, a higher proportion of highly reducible iridium species as well as an increase in defective Ir3+ species on the surface is observed by XPS, directly related to the enhanced activity. The highly reducible species are oxidized under the reaction conditions, leading to an initial decrease in activity before reaching a stable rate of oxidation reaction. This knowledge provides useful guidelines for the design of iridium-based systems for the total oxidation of volatile organic compounds at low temperatures.Authors from UV thank the University of Valencia (UV-INV-AE16-484416 project) and MINECO (MAT2017-84118-C2-1-R project) for funding. Mathias Van de Vyver is acknowledged for the Raman study. T.G. would also like to thank the Regional Government of Aragón (DGA) for the support provided under the research groups support programme.Peer reviewedElsevierMinisterio de Ciencia, Innovación y Universidades (España)Universidad de ValenciaGobierno de AragónAgouram, S. [0000-0002-9906-1174]López Sebastián, José Manuel [0000-0002-6203-8835]Torrente-Murciano, Laura [0000-0002-7938-2587]García Martínez, Tomás [0000-0003-4255-5998]Solsona, Benjamín [0000-0001-7235-2038]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/183775reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-84118-C2-1-Rhttp://dx.doi.org/10.1016/j.cej.2019.02.087Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1837752026-05-22T06:33:51Z
dc.title.none.fl_str_mv Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
title Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
spellingShingle Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
Schick, Lukas
Iridium
Silica
VOC
Short chain alkanes
Total oxidation
Size-activity relationship
title_short Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
title_full Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
title_fullStr Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
title_full_unstemmed Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
title_sort Size-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)
dc.creator.none.fl_str_mv Schick, Lukas
Sanchis, Rut
González-Alfaro, Vicenta
Agouram, Saïd
López Sebastián, José Manuel
Torrente-Murciano, Laura
García Martínez, Tomás
Solsona, Benjamín
author Schick, Lukas
author_facet Schick, Lukas
Sanchis, Rut
González-Alfaro, Vicenta
Agouram, Saïd
López Sebastián, José Manuel
Torrente-Murciano, Laura
García Martínez, Tomás
Solsona, Benjamín
author_role author
author2 Sanchis, Rut
González-Alfaro, Vicenta
Agouram, Saïd
López Sebastián, José Manuel
Torrente-Murciano, Laura
García Martínez, Tomás
Solsona, Benjamín
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Universidad de Valencia
Gobierno de Aragón
Agouram, S. [0000-0002-9906-1174]
López Sebastián, José Manuel [0000-0002-6203-8835]
Torrente-Murciano, Laura [0000-0002-7938-2587]
García Martínez, Tomás [0000-0003-4255-5998]
Solsona, Benjamín [0000-0001-7235-2038]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Iridium
Silica
VOC
Short chain alkanes
Total oxidation
Size-activity relationship
topic Iridium
Silica
VOC
Short chain alkanes
Total oxidation
Size-activity relationship
description 12 Figures, 2 Tables.-- Datos suplementarios disponibles en línea en la página web del editor.-- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
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/10261/183775
url http://hdl.handle.net/10261/183775
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-84118-C2-1-R
http://dx.doi.org/10.1016/j.cej.2019.02.087
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
_version_ 1869411048941944832
score 15,198674

Similares en LA Referencia