In situ XRD for pseudo Laves phases hydrides highlighting the remained cubic structure
| hal.structure.identifier | Department of Science and Engineering of Oxide Materials and Nanomaterials | |
| dc.contributor.author | STAN, Cristina | |
| hal.structure.identifier | National Institute of Advanced Industrial Science and Technology [AIST] | |
| dc.contributor.author | ASANO, Kohta | |
| hal.structure.identifier | National Institute of Advanced Industrial Science and Technology [AIST] | |
| dc.contributor.author | SAKAKI, Kouji | |
| hal.structure.identifier | National Institute of Advanced Industrial Science and Technology [AIST] | |
| dc.contributor.author | AKIBA, Etsuo | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | COUILLAUD, Samuel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BOBET, Jean-Louis | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0360-3199 | |
| dc.description.abstractEn | The hydrogenation behaviour of the Gd<sub>0.5</sub>Y<sub>0.5</sub>Ni<sub>3.75</sub>Al<sub>0.25</sub>Mg compound was studied by in situ X-ray diffraction under hydrogen pressure and at room temperature. The presence of gadolinium induce an exchange between the 4a (occupied by RE) and 4c sites (occupied by Mg). Nevertheless, only the Gd atoms are mixed by Mg atoms and no occurrence of Y/Mg mixing can be observed. The exchange is then directly correlated with the 4f electrons. Moreover, in the compounds without Gd (i.e. YNi<sub>3.75</sub>Al<sub>0.25</sub>Mg) no exchange was observed. The structure of the metal hydrides was carefully investigated by refining the in situ XRD patterns obtained under various H<sub>2</sub> pressures. It was concluded that the structure remains cubic during the sorption process with an increase of the cell volume close to 13%, in agreement with the maximum sorption capacity (i.e. 3H/formula unit). No variation of the exchange rate between the hydride and the initial intermetallic can be highlighted. The changes of both the crystallite size and lattice strains during the sorption process (i.e. along the PC isotherms) indicated that a decrease of the crystallinity is observed but no HIA process occurred. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Hydrogen sorption | |
| dc.subject.en | In situ XRD | |
| dc.subject.en | Laves phases | |
| dc.title.en | In situ XRD for pseudo Laves phases hydrides highlighting the remained cubic structure | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.ijhydene.2009.02.012 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | International Journal of Hydrogen Energy | |
| bordeaux.page | 3038-3043 | |
| bordeaux.volume | 34 | |
| bordeaux.issue | 7 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00378358 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00378358v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International%20Journal%20of%20Hydrogen%20Energy&rft.date=2009&rft.volume=34&rft.issue=7&rft.spage=3038-3043&rft.epage=3038-3043&rft.eissn=0360-3199&rft.issn=0360-3199&rft.au=STAN,%20Cristina&ASANO,%20Kohta&SAKAKI,%20Kouji&AKIBA,%20Etsuo&COUILLAUD,%20Samuel&rft.genre=article |
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