Effect of the Partial Replacement of CaH2 with CaF2 in the Mixed System CaH2 + MgB2

C. Pistidda, F. Karimi, S. Garroni, A. Rzeszutek, C. Bonatto Minella, C. Milanese, T. T. Le, L. H. Rude, J. Skibsted, T. R. Jensen, C. Horstmann, Carsten Gundlach, M. Tolkiehn, P. K. Pranzas, A. Schreyer, T. Klassen, M. Dornheim

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In this work the effect of a partial replacement of CaH2 with CaF2 on the sorption properties of the system CaH2 + MgB2 has been studied. The first five hydrogen absorption and four desorption reactions of the CaH2 + MgB2 and 3CaH(2) + CaF2 + 4MgB(2) systems were investigated by means of volumetric measurements, high-pressure differential scanning calorimetric technique (HP-DSC), B-11 and 19F MAS NMR spectroscopy, and in situ synchrotron radiation powder X-ray diffraction (SR-PXD). It was observed that already during the mixing of the reactants formation of a nonstoichiometric CaF2-xHx solid solution takes place. Formation of the CaF2-xHx solid solution sensibly affects the overall hydrogen sorption reactions of the system CaH2 + MgB2.
Original languageEnglish
Pages (from-to)28409-28417
JournalJournal of Physical Chemistry C
Issue number49
Publication statusPublished - 2014

Subject classification (UKÄ)

  • Natural Sciences
  • Physical Sciences


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