3CaH(2)+4MgB(2) + CaF2 Reactive Hydride Composite as a Potential Hydrogen Storage Material: Hydrogenation and Dehydrogenation Pathway

K. Suarez Alcantara, J. M. Ramallo-Lopez, U. Boesenberg, I. Saldan, C. Pistidda, F. G. Requejo, T. Jensen, Yngve Cerenius, M. Sorby, J. Avila, J. Bellosta von Colbe, K. Taube, Thomas Klassen, M. Dornheim

Research output: Contribution to journalArticlepeer-review

Abstract

A reactive hydride composite (RHC) with initial composition 3CaH(2) + 4MgB(2) + CaF2 was studied by in situ synchrotron radiation powder X-ray diffraction (SR-PXD) and X-ray absorption near edge structure (XANES) at the B K-edge and at the Ca K-edge. The hydrogenation reaction proceeds by an unknown intermediate. No evidence of intermediates was observed during the dehydrogenation reaction. B and Ca K-edge XANES results hint to a closed interaction of CaF2 and Ca(BH4)(2). The main function of CaF2 in the 3CaH(2) + 4MgB(2) + CaF2 RHC is as a dopant for the hydrogenation and dehydrogenation reactions.
Original languageEnglish
Pages (from-to)7207-7212
JournalJournal of Physical Chemistry C
Volume116
Issue number12
DOIs
Publication statusPublished - 2012

Subject classification (UKÄ)

  • Physical Sciences
  • Natural Sciences

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