Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure

Autores
Shi, Guojun; Franzke, Thomas; Xia, Wei; Sanchez, Miguel Dario; Muhler, Martin
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
MoO3/γ‐Al2O3 composites are synthesized by CVD under atmospheric pressure using Mo(CO)6 as the precursor and porous γ‐Al2O3 particles in a horizontal, rotating, hot‐wall reactor, which is also used for calcination in air. The composites are characterized by N2 physisorption, atomic absorption spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and laser Raman spectroscopy (LRS). The synthesized samples exhibit excellent porosity, even at high Mo loadings. A much higher Mo yield is achieved when applying sublimation‐adsorption in static air instead of using flowing N2. A high degree of Mo dispersion on alumina is confirmed by XRD, LRS, and TEM; with a Mo surface density as high as 5.2 atoms nm−2, the sample is X‐ray amorphous, there are no polymeric molybdate species detectable by LRS, and the island size of the molybdate species is about 1 nm according to TEM. The XPS analysis shows that exclusively MoVI species are present on all synthesized samples. Thus, the applied rotating, hot‐wall reactor achieves efficient mixing and homogeneous deposition.
Fil: Shi, Guojun. Ruhr University Bochum; Alemania
Fil: Franzke, Thomas. Ruhr University Bochum; Alemania
Fil: Xia, Wei. Ruhr University Bochum; Alemania
Fil: Sanchez, Miguel Dario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Ruhr University Bochum; Alemania
Fil: Muhler, Martin. Ruhr University Bochum; Alemania
Materia
ALUMINA
MOLYBDENUM TRIOXODE
Mo(CO)6
ROTATING NOT-WALL REACTOR
SHELL-CORE COMPOSITES
X-RAY PHOTOELECTRON SPECTROSCOPY
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:11336/102595
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/102595
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric PressureShi, GuojunFranzke, ThomasXia, WeiSanchez, Miguel DarioMuhler, MartinALUMINAMOLYBDENUM TRIOXODEMo(CO)6ROTATING NOT-WALL REACTORSHELL-CORE COMPOSITESX-RAY PHOTOELECTRON SPECTROSCOPYhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2MoO3/γ‐Al2O3 composites are synthesized by CVD under atmospheric pressure using Mo(CO)6 as the precursor and porous γ‐Al2O3 particles in a horizontal, rotating, hot‐wall reactor, which is also used for calcination in air. The composites are characterized by N2 physisorption, atomic absorption spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and laser Raman spectroscopy (LRS). The synthesized samples exhibit excellent porosity, even at high Mo loadings. A much higher Mo yield is achieved when applying sublimation‐adsorption in static air instead of using flowing N2. A high degree of Mo dispersion on alumina is confirmed by XRD, LRS, and TEM; with a Mo surface density as high as 5.2 atoms nm−2, the sample is X‐ray amorphous, there are no polymeric molybdate species detectable by LRS, and the island size of the molybdate species is about 1 nm according to TEM. The XPS analysis shows that exclusively MoVI species are present on all synthesized samples. Thus, the applied rotating, hot‐wall reactor achieves efficient mixing and homogeneous deposition.Fil: Shi, Guojun. Ruhr University Bochum; AlemaniaFil: Franzke, Thomas. Ruhr University Bochum; AlemaniaFil: Xia, Wei. Ruhr University Bochum; AlemaniaFil: Sanchez, Miguel Dario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Ruhr University Bochum; AlemaniaFil: Muhler, Martin. Ruhr University Bochum; AlemaniaWiley VCH Verlag2011-05-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/102595Shi, Guojun; Franzke, Thomas; Xia, Wei; Sanchez, Miguel Dario; Muhler, Martin; Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure; Wiley VCH Verlag; Chemical Vapor Deposition; 17; 26-5-2011; 162-1690948-1907CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/cvde.201106909info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/cvde.201106909info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:32:22Zoai:ri.conicet.gov.ar:11336/102595instacron: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 15:32:22.963CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
title Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
spellingShingle Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
Shi, Guojun
ALUMINA
MOLYBDENUM TRIOXODE
Mo(CO)6
ROTATING NOT-WALL REACTOR
SHELL-CORE COMPOSITES
X-RAY PHOTOELECTRON SPECTROSCOPY
title_short Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
title_full Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
title_fullStr Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
title_full_unstemmed Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
title_sort Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure
dc.creator.none.fl_str_mv Shi, Guojun
Franzke, Thomas
Xia, Wei
Sanchez, Miguel Dario
Muhler, Martin
author Shi, Guojun
author_facet Shi, Guojun
Franzke, Thomas
Xia, Wei
Sanchez, Miguel Dario
Muhler, Martin
author_role author
author2 Franzke, Thomas
Xia, Wei
Sanchez, Miguel Dario
Muhler, Martin
author2_role author
author
author
author
dc.subject.none.fl_str_mv ALUMINA
MOLYBDENUM TRIOXODE
Mo(CO)6
ROTATING NOT-WALL REACTOR
SHELL-CORE COMPOSITES
X-RAY PHOTOELECTRON SPECTROSCOPY
topic ALUMINA
MOLYBDENUM TRIOXODE
Mo(CO)6
ROTATING NOT-WALL REACTOR
SHELL-CORE COMPOSITES
X-RAY PHOTOELECTRON SPECTROSCOPY
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv MoO3/γ‐Al2O3 composites are synthesized by CVD under atmospheric pressure using Mo(CO)6 as the precursor and porous γ‐Al2O3 particles in a horizontal, rotating, hot‐wall reactor, which is also used for calcination in air. The composites are characterized by N2 physisorption, atomic absorption spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and laser Raman spectroscopy (LRS). The synthesized samples exhibit excellent porosity, even at high Mo loadings. A much higher Mo yield is achieved when applying sublimation‐adsorption in static air instead of using flowing N2. A high degree of Mo dispersion on alumina is confirmed by XRD, LRS, and TEM; with a Mo surface density as high as 5.2 atoms nm−2, the sample is X‐ray amorphous, there are no polymeric molybdate species detectable by LRS, and the island size of the molybdate species is about 1 nm according to TEM. The XPS analysis shows that exclusively MoVI species are present on all synthesized samples. Thus, the applied rotating, hot‐wall reactor achieves efficient mixing and homogeneous deposition.
Fil: Shi, Guojun. Ruhr University Bochum; Alemania
Fil: Franzke, Thomas. Ruhr University Bochum; Alemania
Fil: Xia, Wei. Ruhr University Bochum; Alemania
Fil: Sanchez, Miguel Dario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Ruhr University Bochum; Alemania
Fil: Muhler, Martin. Ruhr University Bochum; Alemania
description MoO3/γ‐Al2O3 composites are synthesized by CVD under atmospheric pressure using Mo(CO)6 as the precursor and porous γ‐Al2O3 particles in a horizontal, rotating, hot‐wall reactor, which is also used for calcination in air. The composites are characterized by N2 physisorption, atomic absorption spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and laser Raman spectroscopy (LRS). The synthesized samples exhibit excellent porosity, even at high Mo loadings. A much higher Mo yield is achieved when applying sublimation‐adsorption in static air instead of using flowing N2. A high degree of Mo dispersion on alumina is confirmed by XRD, LRS, and TEM; with a Mo surface density as high as 5.2 atoms nm−2, the sample is X‐ray amorphous, there are no polymeric molybdate species detectable by LRS, and the island size of the molybdate species is about 1 nm according to TEM. The XPS analysis shows that exclusively MoVI species are present on all synthesized samples. Thus, the applied rotating, hot‐wall reactor achieves efficient mixing and homogeneous deposition.
publishDate 2011
dc.date.none.fl_str_mv 2011-05-26
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/11336/102595
Shi, Guojun; Franzke, Thomas; Xia, Wei; Sanchez, Miguel Dario; Muhler, Martin; Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure; Wiley VCH Verlag; Chemical Vapor Deposition; 17; 26-5-2011; 162-169
0948-1907
CONICET Digital
CONICET
url http://hdl.handle.net/11336/102595
identifier_str_mv Shi, Guojun; Franzke, Thomas; Xia, Wei; Sanchez, Miguel Dario; Muhler, Martin; Highly Dispersed MoO3/Al2O3 Shell‐Core Composites Synthesized by CVD of Mo(CO)6 under Atmospheric Pressure; Wiley VCH Verlag; Chemical Vapor Deposition; 17; 26-5-2011; 162-169
0948-1907
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/cvde.201106909
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/cvde.201106909
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
dc.publisher.none.fl_str_mv Wiley VCH Verlag
publisher.none.fl_str_mv Wiley VCH Verlag
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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