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A preliminary study of some “pseudo-AB2” compounds: RENi4Mg with RE=La, Ce and Gd. Structural and hydrogen sorption properties

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBOBET, Jean-Louis
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLESPORTES, Pierre
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROQUEFERE, Jean-Gabriel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHEVALIER, Bernard
hal.structure.identifierNational Institute of Advanced Industrial Science and Technology [AIST]
dc.contributor.authorASANO, Kohta
hal.structure.identifierNational Institute of Advanced Industrial Science and Technology [AIST]
dc.contributor.authorSAKAKI, Kouji
hal.structure.identifierNational Institute of Advanced Industrial Science and Technology [AIST]
dc.contributor.authorAKIBA, Etsuo
dc.date.issued2007
dc.identifier.issn0360-3199
dc.description.abstractEnThe compounds RENi4Mg have been elaborated by mechanical alloying (MA) and a subsequent heat treatment at 600°C or 1 h. The lattice parameters are in good agreement with those already reported: 7.165 Ä for GdNi4Mg. The hydrogen sorption behaviors are strongly influenced by the rare earth used: for La compound, hydrogen absorption leads to a structural change and no desorption can be observed, for Ce compound, no reaction towards hydrogen can be noticed and for Gd compound, hydrogen can be absorbed and desorbed reversibly at room temperature. Moreover, for GdNi4Mg, no structural change is reported after hydrogenation and only a slight volume expansion can be noticed (e.g. 5%). The MA process has also been used successfully for the elaboration of GdNi4-xAlxMg up to x=1. In these substituted compounds, hydrogen can also be absorbed and desorbed reversibly at room temperature.
dc.language.isoen
dc.publisherElsevier
dc.subject.enHydrogen sorption
dc.subject.enIntermetallics
dc.subject.enTernary compounds
dc.title.enA preliminary study of some “pseudo-AB2” compounds: RENi4Mg with RE=La, Ce and Gd. Structural and hydrogen sorption properties
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ijhydene.2006.11.031
dc.subject.halChimie/Matériaux
bordeaux.journalInternational Journal of Hydrogen Energy
bordeaux.page2422-2428
bordeaux.volume32
bordeaux.issue13
bordeaux.peerReviewedoui
hal.identifierhal-00193434
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00193434v1
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