3CaH2 + 4MgB2 + CaF2 Reactive Hydride Composite as a Potential Hydrogen Storage Material: Hydrogenation and Dehydrogenation Pathway

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• 作者：K. Suarez Alcantara ; J. M. Ramallo-Lopez ; U. Boesenberg ; I. Saldan ; C. Pistidda ; F. G. Requejo ; T. Jensen ; Y. Cerenius ; M. S酶rby ; J. Avila ; J. Bellosta von Colbe ; K. Taube ; Thomas Klassen ; M. Dornheim
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：March 29, 2012
• 年：2012
• 卷：116
• 期：12
• 页码：7207-7212
• 全文大小：349K
• 年卷期：v.116,no.12(March 29, 2012)
• ISSN：1932-7455

文摘

A reactive hydride composite (RHC) with initial composition 3CaH₂ + 4MgB₂ + 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 3CaH₂ + 4MgB₂ + CaF₂ RHC is as a dopant for the hydrogenation and dehydrogenation reactions.