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Nanostructured Mg for hydrogen production by hydrolysis obtained by MgH2 milling and dehydriding

hal.structure.identifierCentro Atómico Bariloche [Argentine]
dc.contributor.authorPIGHIN, Santiago
hal.structure.identifierCentro Atómico Bariloche [Argentine]
hal.structure.identifierInstituto Balseiro
dc.contributor.authorURRETAVIZCAYA, Guillermina
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBOBET, Jean-Louis
hal.structure.identifierCentro Atómico Bariloche [Argentine]
hal.structure.identifierInstituto Balseiro
dc.contributor.authorCASTRO, Facundo
dc.date.issued2020
dc.identifier.issn0925-8388
dc.description.abstractEnThe synthesis, characterization and hydrolysis properties of nanostructured MgH2 and Mg in a 0.6 M MgCl2 aqueous solution are reported. The microstructural properties of commercial MgH2 are modified by mechanical milling without additives under H2 atmosphere for 5 h. The nanostructured Mg is obtained by dehydriding the as-milled MgH2 under vacuum at 355 °C for 2.5 h. The as-milled MgH2 shows average hydrolysis properties with good hydrogen production capacity (1390 mL/g H2) and kinetics (50% of the total yield in 2.3 min). The nanostructured Mg exhibits excellent hydrolysis properties with a high yield (910 mL/g H2), fast kinetics (90% of the total yield in 2.6 min) and practically no effect of a MgO/Mg(OH)2 passivating layer. The hydrolysis properties of both materials are attributed to their morphology and microstructure. The activation energies of the reaction are estimated and the mechanisms are discussed.
dc.language.isoen
dc.publisherElsevier
dc.title.enNanostructured Mg for hydrogen production by hydrolysis obtained by MgH2 milling and dehydriding
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2020.154000
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page154000
bordeaux.volume827
bordeaux.peerReviewedoui
hal.identifierhal-02648840
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02648840v1
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