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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37681
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T09:33:52Zoai: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:34982025-09-29 09:33:53.129CONICET 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 |
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1844613044997455872 |
score |
13.070432 |