The hydrogen desorption of Sn/MgH2 nanocomposite which is formed by ball milling of MgH2
and tin compounds (Sn, Sn(C4H9)4 or SnCl2), has been studied. The hydrogen desorption
properties (desorption temperature and enthalpy of dehydriding) were significantly improved as a
result of a Sn/MgH2 nanocomposite formation. TDS (thermal desorption spectrometry), TG
(thermogravimetry) and DSC (differential scanning calorimeter) measurements exhibited the
existence of at least two types of hydrogen species in the Sn/MgH2 nanocomposite resulting from
ball milling of MgH2 with Sn; the one was hydrogen in the newly formed Sn/MgH2 nanocomposite
and the other hydrogen derived from MgH2 remaining in Sn/MgH2.
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