Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5

Autores
Zepon, G.; Leiva, D. R.; Kaufman, M. J.; Figueroa, Santiago Jose Alejandro; Floriano, R.; Lamas, Diego Germán; Asselli, A. A. C.; Botta, W. J.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Magnesium complex hydrides are attractive for hydrogen storage applications, mainly due to their high volumetric capacities and to their relatively low cost. In this work, nanocrystalline Mg2CoH5 was synthesized with very high yields (97%) by reactive milling cobalt and magnesium under relatively mild processing conditions (30 bar of H2 pressure and 12 h of milling). The behavior of the milled Mg2CoH5 during heating was studied by a combination of several techniques including DSC, QMS, TGA and in-situ synchrotron XRD. It is shown for the first time that two different mechanisms of hydrogen desorption take place. At low temperatures (up to 325°C), some hydrogen is released by a diffusional mechanism with no change in the crystalline structure of the high temperature γ-Mg2CoH5 phase. At higher temperatures, above 325°C, the γ-Mg2CoH5 phase becomes unstable and the complex hydride decomposes into Mg, Co and H2. This is the first work to report the diffusional hydrogen desorption mechanism for the Mg2CoH5 or any other complex hydride. Furthermore, a complete description of the allotropic β-Mg2CoH5 to γ-Mg2CoH5 phase transition is provided.
Fil: Zepon, G.. Universidade Federal do São Carlos; Brasil
Fil: Leiva, D. R.. Universidade Federal do São Carlos; Brasil
Fil: Kaufman, M. J.. Colorado School of Mines; Estados Unidos
Fil: Figueroa, Santiago Jose Alejandro. Centro Nacional de Pesquisa em Energia e Materiais Rua Giuseppe Máximo Scolfaro; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Floriano, R.. Universidade Estadual de Campinas; Brasil
Fil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina
Fil: Asselli, A. A. C.. Universidade Federal do São Carlos; Brasil
Fil: Botta, W. J.. Universidade Federal do São Carlos; Brasil
Materia
Desorption Mechanisms
In-Situ Xrd
Mg-Based Complex Hydride
Mg2coh5
Reactive Milling
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:11336/37681
Acceder
id CONICETDig_2de764eff099bd296b96b604e2ff048f
oai_identifier_str oai:ri.conicet.gov.ar:11336/37681
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5Zepon, G.Leiva, D. R.Kaufman, M. J.Figueroa, Santiago Jose AlejandroFloriano, R.Lamas, Diego GermánAsselli, A. A. C.Botta, W. J.Desorption MechanismsIn-Situ XrdMg-Based Complex HydrideMg2coh5Reactive Millinghttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Magnesium complex hydrides are attractive for hydrogen storage applications, mainly due to their high volumetric capacities and to their relatively low cost. In this work, nanocrystalline Mg2CoH5 was synthesized with very high yields (97%) by reactive milling cobalt and magnesium under relatively mild processing conditions (30 bar of H2 pressure and 12 h of milling). The behavior of the milled Mg2CoH5 during heating was studied by a combination of several techniques including DSC, QMS, TGA and in-situ synchrotron XRD. It is shown for the first time that two different mechanisms of hydrogen desorption take place. At low temperatures (up to 325°C), some hydrogen is released by a diffusional mechanism with no change in the crystalline structure of the high temperature γ-Mg2CoH5 phase. At higher temperatures, above 325°C, the γ-Mg2CoH5 phase becomes unstable and the complex hydride decomposes into Mg, Co and H2. This is the first work to report the diffusional hydrogen desorption mechanism for the Mg2CoH5 or any other complex hydride. Furthermore, a complete description of the allotropic β-Mg2CoH5 to γ-Mg2CoH5 phase transition is provided.Fil: Zepon, G.. Universidade Federal do São Carlos; BrasilFil: Leiva, D. R.. Universidade Federal do São Carlos; BrasilFil: Kaufman, M. J.. Colorado School of Mines; Estados UnidosFil: Figueroa, Santiago Jose Alejandro. Centro Nacional de Pesquisa em Energia e Materiais Rua Giuseppe Máximo Scolfaro; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Floriano, R.. Universidade Estadual de Campinas; BrasilFil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; ArgentinaFil: Asselli, A. A. C.. Universidade Federal do São Carlos; BrasilFil: Botta, W. J.. Universidade Federal do São Carlos; BrasilElsevier2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37681Zepon, G.; Leiva, D. R.; Kaufman, M. J.; Figueroa, Santiago Jose Alejandro; Floriano, R.; et al.; Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5; Elsevier; International Journal of Hydrogen Energy; 40; 3; 1-2015; 1504-15150360-3199CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0360319914032194info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2014.11.085info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:54Zoai:ri.conicet.gov.ar:11336/37681instacron: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:34982025-10-22 11:01:55.177CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
title Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
spellingShingle Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
Zepon, G.
Desorption Mechanisms
In-Situ Xrd
Mg-Based Complex Hydride
Mg2coh5
Reactive Milling
title_short Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
title_full Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
title_fullStr Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
title_full_unstemmed Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
title_sort Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5
dc.creator.none.fl_str_mv Zepon, G.
Leiva, D. R.
Kaufman, M. J.
Figueroa, Santiago Jose Alejandro
Floriano, R.
Lamas, Diego Germán
Asselli, A. A. C.
Botta, W. J.
author Zepon, G.
author_facet Zepon, G.
Leiva, D. R.
Kaufman, M. J.
Figueroa, Santiago Jose Alejandro
Floriano, R.
Lamas, Diego Germán
Asselli, A. A. C.
Botta, W. J.
author_role author
author2 Leiva, D. R.
Kaufman, M. J.
Figueroa, Santiago Jose Alejandro
Floriano, R.
Lamas, Diego Germán
Asselli, A. A. C.
Botta, W. J.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Desorption Mechanisms
In-Situ Xrd
Mg-Based Complex Hydride
Mg2coh5
Reactive Milling
topic Desorption Mechanisms
In-Situ Xrd
Mg-Based Complex Hydride
Mg2coh5
Reactive Milling
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Magnesium complex hydrides are attractive for hydrogen storage applications, mainly due to their high volumetric capacities and to their relatively low cost. In this work, nanocrystalline Mg2CoH5 was synthesized with very high yields (97%) by reactive milling cobalt and magnesium under relatively mild processing conditions (30 bar of H2 pressure and 12 h of milling). The behavior of the milled Mg2CoH5 during heating was studied by a combination of several techniques including DSC, QMS, TGA and in-situ synchrotron XRD. It is shown for the first time that two different mechanisms of hydrogen desorption take place. At low temperatures (up to 325°C), some hydrogen is released by a diffusional mechanism with no change in the crystalline structure of the high temperature γ-Mg2CoH5 phase. At higher temperatures, above 325°C, the γ-Mg2CoH5 phase becomes unstable and the complex hydride decomposes into Mg, Co and H2. This is the first work to report the diffusional hydrogen desorption mechanism for the Mg2CoH5 or any other complex hydride. Furthermore, a complete description of the allotropic β-Mg2CoH5 to γ-Mg2CoH5 phase transition is provided.
Fil: Zepon, G.. Universidade Federal do São Carlos; Brasil
Fil: Leiva, D. R.. Universidade Federal do São Carlos; Brasil
Fil: Kaufman, M. J.. Colorado School of Mines; Estados Unidos
Fil: Figueroa, Santiago Jose Alejandro. Centro Nacional de Pesquisa em Energia e Materiais Rua Giuseppe Máximo Scolfaro; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Floriano, R.. Universidade Estadual de Campinas; Brasil
Fil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina
Fil: Asselli, A. A. C.. Universidade Federal do São Carlos; Brasil
Fil: Botta, W. J.. Universidade Federal do São Carlos; Brasil
description Magnesium complex hydrides are attractive for hydrogen storage applications, mainly due to their high volumetric capacities and to their relatively low cost. In this work, nanocrystalline Mg2CoH5 was synthesized with very high yields (97%) by reactive milling cobalt and magnesium under relatively mild processing conditions (30 bar of H2 pressure and 12 h of milling). The behavior of the milled Mg2CoH5 during heating was studied by a combination of several techniques including DSC, QMS, TGA and in-situ synchrotron XRD. It is shown for the first time that two different mechanisms of hydrogen desorption take place. At low temperatures (up to 325°C), some hydrogen is released by a diffusional mechanism with no change in the crystalline structure of the high temperature γ-Mg2CoH5 phase. At higher temperatures, above 325°C, the γ-Mg2CoH5 phase becomes unstable and the complex hydride decomposes into Mg, Co and H2. This is the first work to report the diffusional hydrogen desorption mechanism for the Mg2CoH5 or any other complex hydride. Furthermore, a complete description of the allotropic β-Mg2CoH5 to γ-Mg2CoH5 phase transition is provided.
publishDate 2015
dc.date.none.fl_str_mv 2015-01
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/11336/37681
Zepon, G.; Leiva, D. R.; Kaufman, M. J.; Figueroa, Santiago Jose Alejandro; Floriano, R.; et al.; Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5; Elsevier; International Journal of Hydrogen Energy; 40; 3; 1-2015; 1504-1515
0360-3199
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37681
identifier_str_mv Zepon, G.; Leiva, D. R.; Kaufman, M. J.; Figueroa, Santiago Jose Alejandro; Floriano, R.; et al.; Controlled mechanochemical synthesis and hydrogen desorption mechanisms of nanostructured Mg2CoH5; Elsevier; International Journal of Hydrogen Energy; 40; 3; 1-2015; 1504-1515
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/url/https://www.sciencedirect.com/science/article/pii/S0360319914032194
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2014.11.085
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 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
_version_ 1846781214610948096
score 12.982451

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