Hydrogen absorption study of high-energy reactive ball milled Mg composites with palladium additives

• Published in: Journal of alloys and compounds Vol. 580; pp. S144 - S148
• Main Authors: Williams, M., Sibanyoni, J.M., Lototskyy, M., Pollet, B.G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier B.V 15.12.2013; Elsevier
• Subjects: Composite materials; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Kinetics; Magnesium hydride; Materials science; Materials synthesis; materials processing; Mechanochemical processing; Physics; X-ray diffraction; X-ray diffraction; Composite materials; Magnesium hydride; Kinetics; Mechanochemical processing; Ball mill; Intermetallic compounds; Palladium; XRD; Hydrogenation; Nanocomposites; Dehydrogenation; High energy; Morphology; Mechanochemical synthesis; Microstructure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.01.086

► High-energy reactive ball milling in H2 of Mg with amorphous and crystalline Pd black. ► Only crystalline Pd black improves hydrogenation/dehydrogenation performances. ► The modest improvements are associated with the formation of Mg–Pd intermetallides. Hydrogenation behaviour, structure, morphology and dehydrogenation/re-hydrogenation performances of Mg–Pd nanocomposites prepared by high-energy reactive ball milling in H2 (HRBM) of Mg in the presence of amorphous and crystalline Pd black (0.1–5wt.%) were studied. Improvements of hydrogenation kinetics during HRBM were observed only for the materials prepared using crystalline Pd black. The obtained nanocomposites were characterised by modest improvements in their dehydrogenation and re-hydrogenation performances associated with the formation of Mg–Pd intermetallides.