BOBET, Jean-Louis; DESMOULINS-KRAWIEC, Sophie; GRIGOROVA, Elie; CANSELL, François; CHEVALIER, Bernard

doi:10.1016/S0925-8388(02)01030-7

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BOBET, Jean-Louis
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DESMOULINS-KRAWIEC, Sophie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GRIGOROVA, Elie
Institute of General and Inorganic Chemistry

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Journal of Alloys and Compounds. 2003, vol. 351, n° 1-2, p. 217-221

Elsevier

Résumé en anglais

The combination of (i) the catalytic effects of Cr2O3, (ii) reactive mechanical grinding (RMG), and (iii) nanosize particles allow a huge improvement in the sorption properties of magnesium. For short milling duration, the absorption kinetics were already as good as that reported for nanocrystalline (Mg+Cr2O3) mixtures. The desorption process is also improved but not in a similar manner. It is assumed that the RMG of nanosized particles of Cr2O3 results in the formation of some Cr atoms in the mixture which greatly influence the sorption behavior. The combination of (i) the catalytic effects of Cr2O3, (ii) reactive mechanical grinding (RMG), and (iii) nanosize particles allow a huge improvement in the sorption properties of magnesium. For short milling duration, the absorption kinetics were already as good as that reported for nanocrystalline (Mg+Cr2O3) mixtures. The desorption process is also improved but not in a similar manner. It is assumed that the RMG of nanosized particles of Cr2O3 results in the formation of some Cr atoms in the mixture which greatly influence the sorption behavior.< Réduire

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Hydrogen absorbing materials

Metal hydrides

Mechanical alloying

Gas–solid reactions

X-ray diffraction

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Addition of nanosized Cr2O3 to magnesium for improvement of the hydrogen sorption properties

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