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Hydrogen Sorption in the LiH–LiF–MgB2 System

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Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Department of Nanotechnology, Max-Planck Str. 1, D-21502 Geesthacht, Germany
Helmut-Schmidt-Universität, University of the Federal Armed Forces Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany
§ School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Dipartimento di Chimica IFM, Università di Torino and NIS, Nanostructured Interfaces and Surfaces Centre of Excellence, Via P. Giuria 7, I - 10125 Torino, Italy
Physics Department, Institute for Energy Technology, Instituttveien 18, NO-2007 Kjeller, Norway
# Center for Materials Crystallography, Department of Chemistry, and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
Instrument Centre for Solid-State NMR Spectroscopy, Department of Chemistry, and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
MAX IV Laboratory, Lund University, Ole Romers Vag 1, SE-22363 Lund, Sweden
*Tel.: +38 032 2600397. E-mail: [email protected]
Cite this: J. Phys. Chem. C 2013, 117, 33, 17360–17366
Publication Date (Web):July 22, 2013
https://doi.org/10.1021/jp405856s
Copyright © 2013 American Chemical Society

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    Abstract

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    A composite material in the LiH–LiF–MgB2 system has been synthesized by high-energy ball milling. Some peaks in addition to that of the binary 2LiH–MgB2 and 2LiF–MgB2 systems are observed for the composite material by high-pressure differential scanning calorimetry (HP-DSC), indicating the formation of intermediate phases. In situ synchrotron radiation powder X-ray diffraction (SR-PXD) performed at 60 bar of H2 and 390 °C shows a superposition of both reaction pathways that are typical for 2LiH–MgB2 and 2LiF–MgB2. After hydrogen absorption of the LiH–LiF–MgB2 composite the vibrational modes of LiBH4 were observed by attenuated total reflection infrared (ATR-IR) spectroscopy. The 19F MAS NMR spectrum of the LiF–LiBH4 sample after heat treatment in hydrogen is strongly dominated by the centerband and spinning sidebands from LiF; in addition, a low-intensity resonance, very similar to that of [BF4] ion, is identified.

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    This article is cited by 9 publications.

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