COUILLAUD, Samuel; KIRIKOVA, Marina; ZAIDI, Warda; BONNET, Jean-Pierre; MARRE, Samuel; AYMONIER, Cyril; ZHANG, Juxian; CUEVAS, Fermin; LATROCHE, Michel; AYMARD, Luc; BOBET, Jean-Louis

doi:10.1016/j.jallcom.2013.03.229

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COUILLAUD, Samuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

KIRIKOVA, Marina
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ZAIDI, Warda
Institut de Chimie et des Matériaux Paris-Est [ICMPE]

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Journal of Alloys and Compounds. 2013, vol. 574, p. 6-12

Elsevier

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The deposition of Pd nanoparticles on the binary compound Mg0.65Sc0.35 using the Supercritical Fluid Chemical Deposition (SFCD) method was performed. There, the SFCD operating parameters (co-solvent, temperature, CO2 and hydrogen pressure, reaction time) have been optimized to obtain homogeneous deposition of Pd nanoparticles (around 10 nm). The hydrogenation properties of the optimized Pd@Mg0.65Sc0.35 material were determined and compared to those of Mg0.65Sc0.35Pd0.024. The latter compound forms at 300 °C and 1 MPa of H2 a hydride that crystallizes in the fluorite structure, absorbs reversibly 1.5 wt.% hydrogen and exhibits fast kinetics. In contrast, Pd@Mg0.65Sc0.35 compound decomposes into ScH2 and MgH2 during hydrogen absorption under the same conditions. However, reversible sorption reaches 3.3 wt.% of hydrogen while keeping good kinetics. The possible roles of Pd on the hydrogen-induced alloy decomposition are discussed.< Réduire

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Nanoparticles

Supercritical fluid chemical deposition method

Hydrogen storage

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Supercritical fluid chemical deposition of Pd nanoparticles on magnesium-scandium alloy for hydrogen storage

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