Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen

Autores
Pighin, Santiago Alberto; Urretavizcaya, Guillermina; Castro, Facundo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A mixture of MgH2 and (7 mol%) NbF5 has been mechanically milled under Ar atmosphere. The evolution of the materials has been studied by in situ pressure monitoring, XRD, DSC, TG, TPD, SEM, and isothermal hydrogen absorption and desorption in a volumetric device. During milling, H-rich and F-rich solid solutions MgH2−xFx and MgHyF2−y are produced. After 40 h of milling both solutions merge into a single one with formula MgH1.60F0.40. This solid solution is stable under a thermal treatment of 90 h at 300 °C under 6000 kPa of H2. Hydriding and dehydriding kinetics in the as-milled and cycled materials are considerably faster than in MgH2 milled without additive. Desorption temperature in DSC or TG is lowered 100 °C, and the material modified with NbF5 can be hydrided in less than 4 min at T = 250 °C. A H-rich solution is formed upon rehydriding the material, showing the reversibility of the process. The kinetic improvement seems to be due to a cooperative effect between MgHyF2−y and niobium hydride, the former providing seeding crystals for MgH2 nucleation, and the latter working as a gateway for hydrogen transfer.
Fil: Pighin, Santiago Alberto. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Urretavizcaya, Guillermina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Castro, Facundo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Hydrogen Storage
Magnesium Hydride
Niobium Fluoride
Mechanical Alloying
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/38151
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/38151
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogenPighin, Santiago AlbertoUrretavizcaya, GuillerminaCastro, FacundoHydrogen StorageMagnesium HydrideNiobium FluorideMechanical Alloyinghttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A mixture of MgH2 and (7 mol%) NbF5 has been mechanically milled under Ar atmosphere. The evolution of the materials has been studied by in situ pressure monitoring, XRD, DSC, TG, TPD, SEM, and isothermal hydrogen absorption and desorption in a volumetric device. During milling, H-rich and F-rich solid solutions MgH2−xFx and MgHyF2−y are produced. After 40 h of milling both solutions merge into a single one with formula MgH1.60F0.40. This solid solution is stable under a thermal treatment of 90 h at 300 °C under 6000 kPa of H2. Hydriding and dehydriding kinetics in the as-milled and cycled materials are considerably faster than in MgH2 milled without additive. Desorption temperature in DSC or TG is lowered 100 °C, and the material modified with NbF5 can be hydrided in less than 4 min at T = 250 °C. A H-rich solution is formed upon rehydriding the material, showing the reversibility of the process. The kinetic improvement seems to be due to a cooperative effect between MgHyF2−y and niobium hydride, the former providing seeding crystals for MgH2 nucleation, and the latter working as a gateway for hydrogen transfer.Fil: Pighin, Santiago Alberto. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Urretavizcaya, Guillermina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Castro, Facundo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38151Pighin, Santiago Alberto; Urretavizcaya, Guillermina; Castro, Facundo; Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen; Elsevier; International Journal of Hydrogen Energy; 40; 13; 2-2015; 4585-45960360-3199CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2015.01.153info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0360319915002451info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:30:27Zoai:ri.conicet.gov.ar:11336/38151instacron: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:34982025-09-29 10:30:28.172CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
title Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
spellingShingle Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
Pighin, Santiago Alberto
Hydrogen Storage
Magnesium Hydride
Niobium Fluoride
Mechanical Alloying
title_short Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
title_full Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
title_fullStr Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
title_full_unstemmed Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
title_sort Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
dc.creator.none.fl_str_mv Pighin, Santiago Alberto
Urretavizcaya, Guillermina
Castro, Facundo
author Pighin, Santiago Alberto
author_facet Pighin, Santiago Alberto
Urretavizcaya, Guillermina
Castro, Facundo
author_role author
author2 Urretavizcaya, Guillermina
Castro, Facundo
author2_role author
author
dc.subject.none.fl_str_mv Hydrogen Storage
Magnesium Hydride
Niobium Fluoride
Mechanical Alloying
topic Hydrogen Storage
Magnesium Hydride
Niobium Fluoride
Mechanical Alloying
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A mixture of MgH2 and (7 mol%) NbF5 has been mechanically milled under Ar atmosphere. The evolution of the materials has been studied by in situ pressure monitoring, XRD, DSC, TG, TPD, SEM, and isothermal hydrogen absorption and desorption in a volumetric device. During milling, H-rich and F-rich solid solutions MgH2−xFx and MgHyF2−y are produced. After 40 h of milling both solutions merge into a single one with formula MgH1.60F0.40. This solid solution is stable under a thermal treatment of 90 h at 300 °C under 6000 kPa of H2. Hydriding and dehydriding kinetics in the as-milled and cycled materials are considerably faster than in MgH2 milled without additive. Desorption temperature in DSC or TG is lowered 100 °C, and the material modified with NbF5 can be hydrided in less than 4 min at T = 250 °C. A H-rich solution is formed upon rehydriding the material, showing the reversibility of the process. The kinetic improvement seems to be due to a cooperative effect between MgHyF2−y and niobium hydride, the former providing seeding crystals for MgH2 nucleation, and the latter working as a gateway for hydrogen transfer.
Fil: Pighin, Santiago Alberto. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Urretavizcaya, Guillermina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Castro, Facundo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description A mixture of MgH2 and (7 mol%) NbF5 has been mechanically milled under Ar atmosphere. The evolution of the materials has been studied by in situ pressure monitoring, XRD, DSC, TG, TPD, SEM, and isothermal hydrogen absorption and desorption in a volumetric device. During milling, H-rich and F-rich solid solutions MgH2−xFx and MgHyF2−y are produced. After 40 h of milling both solutions merge into a single one with formula MgH1.60F0.40. This solid solution is stable under a thermal treatment of 90 h at 300 °C under 6000 kPa of H2. Hydriding and dehydriding kinetics in the as-milled and cycled materials are considerably faster than in MgH2 milled without additive. Desorption temperature in DSC or TG is lowered 100 °C, and the material modified with NbF5 can be hydrided in less than 4 min at T = 250 °C. A H-rich solution is formed upon rehydriding the material, showing the reversibility of the process. The kinetic improvement seems to be due to a cooperative effect between MgHyF2−y and niobium hydride, the former providing seeding crystals for MgH2 nucleation, and the latter working as a gateway for hydrogen transfer.
publishDate 2015
dc.date.none.fl_str_mv 2015-02
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/11336/38151
Pighin, Santiago Alberto; Urretavizcaya, Guillermina; Castro, Facundo; Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen; Elsevier; International Journal of Hydrogen Energy; 40; 13; 2-2015; 4585-4596
0360-3199
CONICET Digital
CONICET
url http://hdl.handle.net/11336/38151
identifier_str_mv Pighin, Santiago Alberto; Urretavizcaya, Guillermina; Castro, Facundo; Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen; Elsevier; International Journal of Hydrogen Energy; 40; 13; 2-2015; 4585-4596
0360-3199
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2015.01.153
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0360319915002451
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 13.070432

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