Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate

Iridium catalysts were prepared using alumina or silica as supports and two preparation methods, incipient wetness impregnation and flame spray pyrolysis. These catalysts were characterized, after reduction in hydrogen, by transmission electron microscopy, infrared spectroscopy of adsorbed CO and mi...

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Autores: Dongil, Ana Belén, Bachiller-Baeza, B., Rodríguez-Ramos, Inmaculada, Guerrero-Ruiz, Antonio, Mondelli, C., Baiker. A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/182432
Acceso en línea:http://hdl.handle.net/10261/182432
Access Level:acceso abierto
Palabra clave:Iridium catalysts
Microcalorimetry
Ethyl pyruvate
Asymmetric hydrogenation
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spelling Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvateDongil, Ana BelénBachiller-Baeza, B.Rodríguez-Ramos, InmaculadaGuerrero-Ruiz, AntonioMondelli, C.Baiker. A.Iridium catalystsMicrocalorimetryEthyl pyruvateAsymmetric hydrogenationIridium catalysts were prepared using alumina or silica as supports and two preparation methods, incipient wetness impregnation and flame spray pyrolysis. These catalysts were characterized, after reduction in hydrogen, by transmission electron microscopy, infrared spectroscopy of adsorbed CO and microcalorimetry of CO chemisorption. Aliquots of these catalysts were tested in the ethyl pyruvate hydrogenation using cinchonidine as a chiral modifier. Different enantioselectivities to (R)-ethyl lactate were obtained depending on the support material and the preparation method. Based on the structural characterization it is proposed that the different enantioselectivities are mainly due to different surface structure of the iridium nanoparticles caused by the support interaction.Authors acknowledge the MICINN of Spain (Projects CTQ-2011-29272-C04-01 and -03) for financial support.Peer reviewedPeer ReviewedElsevierMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920132019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/182432reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésIngléshttps://doi.org/10.1016/j.apcata.2012.10.032Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1824322026-05-22T06:33:51Z
dc.title.none.fl_str_mv Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
title Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
spellingShingle Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
Dongil, Ana Belén
Iridium catalysts
Microcalorimetry
Ethyl pyruvate
Asymmetric hydrogenation
title_short Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
title_full Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
title_fullStr Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
title_full_unstemmed Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
title_sort Structural properties of alumina- and silica-supported Iridium catalysts and their behavior in the enantioselective hydrogenation of ethyl pyruvate
dc.creator.none.fl_str_mv Dongil, Ana Belén
Bachiller-Baeza, B.
Rodríguez-Ramos, Inmaculada
Guerrero-Ruiz, Antonio
Mondelli, C.
Baiker. A.
author Dongil, Ana Belén
author_facet Dongil, Ana Belén
Bachiller-Baeza, B.
Rodríguez-Ramos, Inmaculada
Guerrero-Ruiz, Antonio
Mondelli, C.
Baiker. A.
author_role author
author2 Bachiller-Baeza, B.
Rodríguez-Ramos, Inmaculada
Guerrero-Ruiz, Antonio
Mondelli, C.
Baiker. A.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Iridium catalysts
Microcalorimetry
Ethyl pyruvate
Asymmetric hydrogenation
topic Iridium catalysts
Microcalorimetry
Ethyl pyruvate
Asymmetric hydrogenation
description Iridium catalysts were prepared using alumina or silica as supports and two preparation methods, incipient wetness impregnation and flame spray pyrolysis. These catalysts were characterized, after reduction in hydrogen, by transmission electron microscopy, infrared spectroscopy of adsorbed CO and microcalorimetry of CO chemisorption. Aliquots of these catalysts were tested in the ethyl pyruvate hydrogenation using cinchonidine as a chiral modifier. Different enantioselectivities to (R)-ethyl lactate were obtained depending on the support material and the preparation method. Based on the structural characterization it is proposed that the different enantioselectivities are mainly due to different surface structure of the iridium nanoparticles caused by the support interaction.
publishDate 2013
dc.date.none.fl_str_mv 2013
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/10261/182432
url http://hdl.handle.net/10261/182432
dc.language.none.fl_str_mv Inglés
Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.apcata.2012.10.032
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
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score 15,811543

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