Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys

Autores
Erika, Teliz; Faccio Sgiorovello, Ricardo Juan; Ruiz, Fabricio Carlos; Fernando, Zinola; Verónica, Díaz
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effects of partial replacement of chromium by molybdenum was studied on the structure and electrochemical kinetic properties of ZrCr1-xNiMox(x = 0.0, 0.3 and 0.6) metal hydride alloys. The arc-melting prepared alloys were metallurgically characterized by X-ray diffraction and energy dispersive spectroscopy microanalysis, which showed AB2 (with hexagonal C14 structure) and ZrxNiy (Zr7Ni10, Zr9Ni11) phases. After a partial substitution of chromium by molybdenum, secondary phases monotonically increase with the C14 unit cell volume indicating that most of molybdenum atoms locate in the B-site. The alloys were electrochemically characterized using charge/discharge cycling, electrochemical impedance spectroscopy and rate capability experiments that allowed the determination of hydriding reaction kinetic parameters. The presence of molybdenum produces a positive effect for hydrogen diffusion in the alloy lattice, and ZrCr0.7NiMo0.3 alloy depicts the better kinetics associated with a fast activation, lower charge transfer resistance and the best high rate discharge behavior. This fact would be related to a lower diffusion time constant and a bigger value of the product between exchange density current and surface active area. There is a trade-off in the amounts of secondary phase and Laves phases in order to improve the kinetic performance.
Fil: Erika, Teliz. Universidad de la República; Uruguay
Fil: Faccio Sgiorovello, Ricardo Juan. Universidad de la República; Uruguay
Fil: Ruiz, Fabricio Carlos. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fernando, Zinola. Universidad de la República; Uruguay
Fil: Verónica, Díaz. Universidad de la República; Uruguay
Materia
Hydrogen
Laves Phase
Metal Hydrides
Molybdenum
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:11336/50156
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/50156
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloysErika, TelizFaccio Sgiorovello, Ricardo JuanRuiz, Fabricio CarlosFernando, ZinolaVerónica, DíazHydrogenLaves PhaseMetal HydridesMolybdenumhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The effects of partial replacement of chromium by molybdenum was studied on the structure and electrochemical kinetic properties of ZrCr1-xNiMox(x = 0.0, 0.3 and 0.6) metal hydride alloys. The arc-melting prepared alloys were metallurgically characterized by X-ray diffraction and energy dispersive spectroscopy microanalysis, which showed AB2 (with hexagonal C14 structure) and ZrxNiy (Zr7Ni10, Zr9Ni11) phases. After a partial substitution of chromium by molybdenum, secondary phases monotonically increase with the C14 unit cell volume indicating that most of molybdenum atoms locate in the B-site. The alloys were electrochemically characterized using charge/discharge cycling, electrochemical impedance spectroscopy and rate capability experiments that allowed the determination of hydriding reaction kinetic parameters. The presence of molybdenum produces a positive effect for hydrogen diffusion in the alloy lattice, and ZrCr0.7NiMo0.3 alloy depicts the better kinetics associated with a fast activation, lower charge transfer resistance and the best high rate discharge behavior. This fact would be related to a lower diffusion time constant and a bigger value of the product between exchange density current and surface active area. There is a trade-off in the amounts of secondary phase and Laves phases in order to improve the kinetic performance.Fil: Erika, Teliz. Universidad de la República; UruguayFil: Faccio Sgiorovello, Ricardo Juan. Universidad de la República; UruguayFil: Ruiz, Fabricio Carlos. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fernando, Zinola. Universidad de la República; UruguayFil: Verónica, Díaz. Universidad de la República; UruguayElsevier Science Sa2015-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/50156Erika, Teliz; Faccio Sgiorovello, Ricardo Juan; Ruiz, Fabricio Carlos; Fernando, Zinola; Verónica, Díaz; Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys; Elsevier Science Sa; Journal of Alloys and Compounds; 649; 7-2015; 267-2740925-8388CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2015.07.206info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925838815306034info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:40:03Zoai:ri.conicet.gov.ar:11336/50156instacron: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:34982025-11-12 09:40:04.105CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
title Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
spellingShingle Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
Erika, Teliz
Hydrogen
Laves Phase
Metal Hydrides
Molybdenum
title_short Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
title_full Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
title_fullStr Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
title_full_unstemmed Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
title_sort Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
dc.creator.none.fl_str_mv Erika, Teliz
Faccio Sgiorovello, Ricardo Juan
Ruiz, Fabricio Carlos
Fernando, Zinola
Verónica, Díaz
author Erika, Teliz
author_facet Erika, Teliz
Faccio Sgiorovello, Ricardo Juan
Ruiz, Fabricio Carlos
Fernando, Zinola
Verónica, Díaz
author_role author
author2 Faccio Sgiorovello, Ricardo Juan
Ruiz, Fabricio Carlos
Fernando, Zinola
Verónica, Díaz
author2_role author
author
author
author
dc.subject.none.fl_str_mv Hydrogen
Laves Phase
Metal Hydrides
Molybdenum
topic Hydrogen
Laves Phase
Metal Hydrides
Molybdenum
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The effects of partial replacement of chromium by molybdenum was studied on the structure and electrochemical kinetic properties of ZrCr1-xNiMox(x = 0.0, 0.3 and 0.6) metal hydride alloys. The arc-melting prepared alloys were metallurgically characterized by X-ray diffraction and energy dispersive spectroscopy microanalysis, which showed AB2 (with hexagonal C14 structure) and ZrxNiy (Zr7Ni10, Zr9Ni11) phases. After a partial substitution of chromium by molybdenum, secondary phases monotonically increase with the C14 unit cell volume indicating that most of molybdenum atoms locate in the B-site. The alloys were electrochemically characterized using charge/discharge cycling, electrochemical impedance spectroscopy and rate capability experiments that allowed the determination of hydriding reaction kinetic parameters. The presence of molybdenum produces a positive effect for hydrogen diffusion in the alloy lattice, and ZrCr0.7NiMo0.3 alloy depicts the better kinetics associated with a fast activation, lower charge transfer resistance and the best high rate discharge behavior. This fact would be related to a lower diffusion time constant and a bigger value of the product between exchange density current and surface active area. There is a trade-off in the amounts of secondary phase and Laves phases in order to improve the kinetic performance.
Fil: Erika, Teliz. Universidad de la República; Uruguay
Fil: Faccio Sgiorovello, Ricardo Juan. Universidad de la República; Uruguay
Fil: Ruiz, Fabricio Carlos. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fernando, Zinola. Universidad de la República; Uruguay
Fil: Verónica, Díaz. Universidad de la República; Uruguay
description The effects of partial replacement of chromium by molybdenum was studied on the structure and electrochemical kinetic properties of ZrCr1-xNiMox(x = 0.0, 0.3 and 0.6) metal hydride alloys. The arc-melting prepared alloys were metallurgically characterized by X-ray diffraction and energy dispersive spectroscopy microanalysis, which showed AB2 (with hexagonal C14 structure) and ZrxNiy (Zr7Ni10, Zr9Ni11) phases. After a partial substitution of chromium by molybdenum, secondary phases monotonically increase with the C14 unit cell volume indicating that most of molybdenum atoms locate in the B-site. The alloys were electrochemically characterized using charge/discharge cycling, electrochemical impedance spectroscopy and rate capability experiments that allowed the determination of hydriding reaction kinetic parameters. The presence of molybdenum produces a positive effect for hydrogen diffusion in the alloy lattice, and ZrCr0.7NiMo0.3 alloy depicts the better kinetics associated with a fast activation, lower charge transfer resistance and the best high rate discharge behavior. This fact would be related to a lower diffusion time constant and a bigger value of the product between exchange density current and surface active area. There is a trade-off in the amounts of secondary phase and Laves phases in order to improve the kinetic performance.
publishDate 2015
dc.date.none.fl_str_mv 2015-07
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/11336/50156
Erika, Teliz; Faccio Sgiorovello, Ricardo Juan; Ruiz, Fabricio Carlos; Fernando, Zinola; Verónica, Díaz; Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys; Elsevier Science Sa; Journal of Alloys and Compounds; 649; 7-2015; 267-274
0925-8388
CONICET Digital
CONICET
url http://hdl.handle.net/11336/50156
identifier_str_mv Erika, Teliz; Faccio Sgiorovello, Ricardo Juan; Ruiz, Fabricio Carlos; Fernando, Zinola; Verónica, Díaz; Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys; Elsevier Science Sa; Journal of Alloys and Compounds; 649; 7-2015; 267-274
0925-8388
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.jallcom.2015.07.206
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925838815306034
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
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
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 13.142177

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