MANDZHUKOVA, Tzveta; BOBET, Jean-Louis; KHRUSSANOVA, Maria; PESHEV, Pavel

doi:10.1016/j.materresbull.2009.06.010

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MANDZHUKOVA, Tzveta
Institute of General and Inorganic Chemistry

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

KHRUSSANOVA, Maria
Institute of General and Inorganic Chemistry

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Materials Research Bulletin. 2009, vol. 44, n° 10, p. 1968-1972

Elsevier

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The effect of the mechanical activation medium on the hydrogen absorption–desorption properties of MgH2 with NiCo2O4 additives is investigated. The composite 90 wt.% MgH2–10 wt.% NiCo2O4 mechanically activated for 180 min under hydrogen reaches a higher absorption capacity as compared to the composite ground for the same time in an argon medium. At T = 573 K and P = 1 MPa the composite activated mechanically in a reactive medium shows a value of 5.67 wt.% while for the composite ground under argon the value is 4.36 wt.% only, both samples preserving a high absorption capacity at temperatures below 573 K. Addition of nickel cobaltite is found to have a favorable effect on the hydriding kinetics of magnesium. In order to elucidate this effect, a composite containing a large amount of NiCo2O4 (50 wt.%) is also investigated.< Réduire

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Hydrides

X-ray diffraction

Hydrogen sorption

Inorganic compounds

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Hydrogen sorption properties of MgH<sub>2</sub>–NiCo<sub>2</sub>O<sub>4</sub> composites activated mechanically under argon and hydrogen atmospheres

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