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

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 Mic...

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Detalles Bibliográficos
Autores principales:	Botto, Irma Lía, Vassallo, Marta Beatriz, Muñoz, Mercedes, Cabello, Carmen Inés, Gambaro, Luis A.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2009
Materias:	Química Methanol oxidation MVMoO7 (M= Fe, Cr) Triclinic solid solution Thermal programmed reduction Transients study Solución sólida triclínica Reducción térmica programada Estudio de transientes Oxidación de metanol
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/104740 http://hdl.handle.net/11336/56015
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-104740
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química Methanol oxidation MVMoO7 (M= Fe, Cr) Triclinic solid solution Thermal programmed reduction Transients study Solución sólida triclínica Reducción térmica programada Estudio de transientes Oxidación de metanol
spellingShingle	Química Methanol oxidation MVMoO7 (M= Fe, Cr) Triclinic solid solution Thermal programmed reduction Transients study Solución sólida triclínica Reducción térmica programada Estudio de transientes Oxidación de metanol Botto, Irma Lía Vassallo, Marta Beatriz Muñoz, Mercedes Cabello, Carmen Inés Gambaro, Luis A. MVMoO7 substituted phases (M=Fe, Cr): structural stability, reducibility and catalytic properties in methanol oxidation
topic_facet	Química Methanol oxidation MVMoO7 (M= Fe, Cr) Triclinic solid solution Thermal programmed reduction Transients study Solución sólida triclínica Reducción térmica programada Estudio de transientes Oxidación de metanol
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.
format	Articulo Articulo
author	Botto, Irma Lía Vassallo, Marta Beatriz Muñoz, Mercedes Cabello, Carmen Inés Gambaro, Luis A.
author_facet	Botto, Irma Lía Vassallo, Marta Beatriz Muñoz, Mercedes Cabello, Carmen Inés Gambaro, Luis A.
author_sort	Botto, Irma Lía
title	MVMoO7 substituted phases (M=Fe, Cr): structural stability, reducibility and catalytic properties in methanol oxidation
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
publishDate	2009
url	http://sedici.unlp.edu.ar/handle/10915/104740 http://hdl.handle.net/11336/56015
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bdutipo_str	Repositorios
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MVMoO7 substituted phases (M=Fe, Cr): structural stability, reducibility and catalytic properties in methanol oxidation

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