Improvement of hydriding kinetics of LaNi5-type metal alloy through substitution of nickel with tin followed by palladium deposition

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dc.contributor.authorSomo, Thabang R
dc.contributor.authorModibane, Kwena D
dc.contributor.authorDavis, Moegamat W
dc.contributor.authorLototskyy, Mykhaylo V
dc.date.accessioned2022-02-03T12:45:06Z
dc.date.available2022-02-03T12:45:06Z
dc.date.issued2022
dc.description.abstractHydrogen absorption performances of LaNi5 alloy are sensitive to the surface reactions with poisonous gases, such as oxygen, readily forming oxides/hydroxides. In this study, we report the studies on the hydrogen absorption behaviour of AB5-type hydrogen storage alloys, formed by LaNi(5–x)Snx (X = 0.2) followed by electroless Pd deposition. The uncoated and Pd-coated materials were characterized using scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), atomic absorption spectroscopy (AAS), X-ray diffraction (XRD) and Brunauer–Emmet–Teller. XRD analyses indicated that both LaNi5 and LaNi4.8Sn0.2 alloys crystallize in CaCu5-type crystal structure, while SEM analysis and particle size distribution histograms showed increment in particle size upon Sn incorporation. Palladium particles on the surface of the materials were detected by AAS and EDS analyses. Furthermore, substitution of a small fraction of Ni by Sn leads to an increase in hydrogen absorption capacity even without activation. Moreover, a decrease in hydrogen absorption rate was observed for LaNi4.8Sn0.2 alloy and this was related to an increment in the crystalline unit cell volume. Kinetic curves of Pd-coated alloys show superior absorption kinetics compared to their uncoated counterparts due to high affinity of Pd for hydrogenen_US
dc.identifier.citationSomo, T. R., Modibane, K. D., Davids, M. W., Lototskyy, M. V., & Hato, M. J. (2022). Improvement of hydriding kinetics of LaNi5-type metal alloy through substitution of nickel with tin followed by palladium deposition. Bulletin of Materials Science, 45(1) doi:10.1007/s12034-021-02591-3en_US
dc.identifier.uridoi:10.1007/s12034-021-02591-3
dc.identifier.urihttp://hdl.handle.net/10566/7154
dc.language.isoenen_US
dc.publisherIndian Academy of Sciencesen_US
dc.subjectHydrogen storage materialsen_US
dc.subjectenergy storage materialsen_US
dc.subjectAB5 alloyen_US
dc.subjectPalladium depositionen_US
dc.titleImprovement of hydriding kinetics of LaNi5-type metal alloy through substitution of nickel with tin followed by palladium depositionen_US
dc.typeArticleen_US

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