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

Summary, in English

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.

• Författare: 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
• Avdelning/ar: MAX IV-laboratoriet
• Publiceringsår: 2012
• Språk: Engelska
• Sidor: 7207-7212
• Publikation/Tidskrift/Serie: Journal of Physical Chemistry C
• Volym: 116
• Issue: 12
• Länkar: http://dx.doi.org/10.1021/jp211620h
• Dokumenttyp: Artikel i tidskrift
• Förlag: The American Chemical Society (ACS)
• Ämne: Physical Sciences; Natural Sciences
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1932-7447