MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation

Autores
Botto, Irma Lia; Vassallo, Marta; Muñoz, Mercedes; Cabello, Carmen Ines; Gambaro, Luis Alberto
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Structural, spectroscopic and thermal properties of MVMoO7 (M= Fe, Cr) phases, of potential interest in the catalysis field, are studied by means of X-ray Powder Diffraction XRD, Fourier Transformed Infrared Spectroscopy FTIR, Electronic Scanning Microscopy and X Ray Energy Dispersive Scattering Micro-Analysis SEM-EDS and Temperature Programmed Reduction TPR techniques. Thus, the formation of a triclinic solid solution in a complete range of composition is supported by a little M(III) size difference (about 5 %). In relation to the thermal reduction behaviour, iron is the unique reducible trivalent species. The reduction products of the Fe-Cr solid solution seem to be governed by the structural arrangement and particularly by the presence of M2O10 dimmers. The results are analyzed and compared with TPR data of MoO3, V2O5, M2O3,M2(MoO4)3 and MVO4 (M= Fe, Cr) binary and ternary systems. For the Fe-end member of the isomorphous series, a part of iron remains unreduced as FeV2O4–spinel phase at 1000oC whereas (V,Cr)2O3 is the final oxidizing product for the Cr-end member. However, the (Fe0.5Cr0.5)VMoO7 reduction occurs through the formation of FeMoO4 intermediate, affecting the Mo(VI)-Mo(IV)-Mo stability field and the V(V)-V(III) reduction steps. Finally, MVMoO7 (M= Fe, Cr) phases are chemically proved in the methanol oxidation reaction by Transients Study and the relationships among structural and chemical features and the catalytic behaviour are analyzed and discussed.
Fil: Botto, Irma Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; Argentina
Fil: Vassallo, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; Argentina
Fil: Muñoz, Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Cabello, Carmen Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Gambaro, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Materia
Methanol Oxidation
MVMoO7 (M= Fe, Cr)
TPR
Transients study
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:11336/56015
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/56015
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidationBotto, Irma LiaVassallo, MartaMuñoz, MercedesCabello, Carmen InesGambaro, Luis AlbertoMethanol OxidationMVMoO7 (M= Fe, Cr)TPRTransients studyhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Structural, spectroscopic and thermal properties of MVMoO7 (M= Fe, Cr) phases, of potential interest in the catalysis field, are studied by means of X-ray Powder Diffraction XRD, Fourier Transformed Infrared Spectroscopy FTIR, Electronic Scanning Microscopy and X Ray Energy Dispersive Scattering Micro-Analysis SEM-EDS and Temperature Programmed Reduction TPR techniques. Thus, the formation of a triclinic solid solution in a complete range of composition is supported by a little M(III) size difference (about 5 %). In relation to the thermal reduction behaviour, iron is the unique reducible trivalent species. The reduction products of the Fe-Cr solid solution seem to be governed by the structural arrangement and particularly by the presence of M2O10 dimmers. The results are analyzed and compared with TPR data of MoO3, V2O5, M2O3,M2(MoO4)3 and MVO4 (M= Fe, Cr) binary and ternary systems. For the Fe-end member of the isomorphous series, a part of iron remains unreduced as FeV2O4–spinel phase at 1000oC whereas (V,Cr)2O3 is the final oxidizing product for the Cr-end member. However, the (Fe0.5Cr0.5)VMoO7 reduction occurs through the formation of FeMoO4 intermediate, affecting the Mo(VI)-Mo(IV)-Mo stability field and the V(V)-V(III) reduction steps. Finally, MVMoO7 (M= Fe, Cr) phases are chemically proved in the methanol oxidation reaction by Transients Study and the relationships among structural and chemical features and the catalytic behaviour are analyzed and discussed.Fil: Botto, Irma Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; ArgentinaFil: Vassallo, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; ArgentinaFil: Muñoz, Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Cabello, Carmen Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Gambaro, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaAsociación Química Argentina2009-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/56015Botto, Irma Lia; Vassallo, Marta; Muñoz, Mercedes; Cabello, Carmen Ines; Gambaro, Luis Alberto; MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation; Asociación Química Argentina; Journal of the Argentine Chemical Society; 97; 1; 2-2009; 250-2650365-0375CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aqa.org.ar/images/anales/pdf9701/9701art23.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:28:54Zoai:ri.conicet.gov.ar:11336/56015instacron: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:34982025-10-15 14:28:54.7CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
title MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
spellingShingle MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
Botto, Irma Lia
Methanol Oxidation
MVMoO7 (M= Fe, Cr)
TPR
Transients study
title_short MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
title_full MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
title_fullStr MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
title_full_unstemmed MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
title_sort MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation
dc.creator.none.fl_str_mv Botto, Irma Lia
Vassallo, Marta
Muñoz, Mercedes
Cabello, Carmen Ines
Gambaro, Luis Alberto
author Botto, Irma Lia
author_facet Botto, Irma Lia
Vassallo, Marta
Muñoz, Mercedes
Cabello, Carmen Ines
Gambaro, Luis Alberto
author_role author
author2 Vassallo, Marta
Muñoz, Mercedes
Cabello, Carmen Ines
Gambaro, Luis Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Methanol Oxidation
MVMoO7 (M= Fe, Cr)
TPR
Transients study
topic Methanol Oxidation
MVMoO7 (M= Fe, Cr)
TPR
Transients study
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Structural, spectroscopic and thermal properties of MVMoO7 (M= Fe, Cr) phases, of potential interest in the catalysis field, are studied by means of X-ray Powder Diffraction XRD, Fourier Transformed Infrared Spectroscopy FTIR, Electronic Scanning Microscopy and X Ray Energy Dispersive Scattering Micro-Analysis SEM-EDS and Temperature Programmed Reduction TPR techniques. Thus, the formation of a triclinic solid solution in a complete range of composition is supported by a little M(III) size difference (about 5 %). In relation to the thermal reduction behaviour, iron is the unique reducible trivalent species. The reduction products of the Fe-Cr solid solution seem to be governed by the structural arrangement and particularly by the presence of M2O10 dimmers. The results are analyzed and compared with TPR data of MoO3, V2O5, M2O3,M2(MoO4)3 and MVO4 (M= Fe, Cr) binary and ternary systems. For the Fe-end member of the isomorphous series, a part of iron remains unreduced as FeV2O4–spinel phase at 1000oC whereas (V,Cr)2O3 is the final oxidizing product for the Cr-end member. However, the (Fe0.5Cr0.5)VMoO7 reduction occurs through the formation of FeMoO4 intermediate, affecting the Mo(VI)-Mo(IV)-Mo stability field and the V(V)-V(III) reduction steps. Finally, MVMoO7 (M= Fe, Cr) phases are chemically proved in the methanol oxidation reaction by Transients Study and the relationships among structural and chemical features and the catalytic behaviour are analyzed and discussed.
Fil: Botto, Irma Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; Argentina
Fil: Vassallo, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica ; Argentina
Fil: Muñoz, Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Cabello, Carmen Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Gambaro, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
description Structural, spectroscopic and thermal properties of MVMoO7 (M= Fe, Cr) phases, of potential interest in the catalysis field, are studied by means of X-ray Powder Diffraction XRD, Fourier Transformed Infrared Spectroscopy FTIR, Electronic Scanning Microscopy and X Ray Energy Dispersive Scattering Micro-Analysis SEM-EDS and Temperature Programmed Reduction TPR techniques. Thus, the formation of a triclinic solid solution in a complete range of composition is supported by a little M(III) size difference (about 5 %). In relation to the thermal reduction behaviour, iron is the unique reducible trivalent species. The reduction products of the Fe-Cr solid solution seem to be governed by the structural arrangement and particularly by the presence of M2O10 dimmers. The results are analyzed and compared with TPR data of MoO3, V2O5, M2O3,M2(MoO4)3 and MVO4 (M= Fe, Cr) binary and ternary systems. For the Fe-end member of the isomorphous series, a part of iron remains unreduced as FeV2O4–spinel phase at 1000oC whereas (V,Cr)2O3 is the final oxidizing product for the Cr-end member. However, the (Fe0.5Cr0.5)VMoO7 reduction occurs through the formation of FeMoO4 intermediate, affecting the Mo(VI)-Mo(IV)-Mo stability field and the V(V)-V(III) reduction steps. Finally, MVMoO7 (M= Fe, Cr) phases are chemically proved in the methanol oxidation reaction by Transients Study and the relationships among structural and chemical features and the catalytic behaviour are analyzed and discussed.
publishDate 2009
dc.date.none.fl_str_mv 2009-02
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/11336/56015
Botto, Irma Lia; Vassallo, Marta; Muñoz, Mercedes; Cabello, Carmen Ines; Gambaro, Luis Alberto; MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation; Asociación Química Argentina; Journal of the Argentine Chemical Society; 97; 1; 2-2009; 250-265
0365-0375
CONICET Digital
CONICET
url http://hdl.handle.net/11336/56015
identifier_str_mv Botto, Irma Lia; Vassallo, Marta; Muñoz, Mercedes; Cabello, Carmen Ines; Gambaro, Luis Alberto; MVMoO7 substituted phases (M=Fe, Cr): Structural stability, reducibility and catalytic properties in methanol oxidation; Asociación Química Argentina; Journal of the Argentine Chemical Society; 97; 1; 2-2009; 250-265
0365-0375
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aqa.org.ar/images/anales/pdf9701/9701art23.pdf
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
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Asociación Química Argentina
publisher.none.fl_str_mv Asociación Química Argentina
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 13.22299

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