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Publication Detail
Effect of nitride additives on Li-N-H hydrogen storage system
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Nayebossadri S, Aguey-Zinsou KF, Guo ZX
  • Publisher:
    PERGAMON-ELSEVIER SCIENCE LTD
  • Publication date:
    07/2011
  • Pagination:
    7920, 7926
  • Journal:
    INT J HYDROGEN ENERG
  • Volume:
    36
  • Issue:
    13
  • Print ISSN:
    0360-3199
  • Language:
    EN
  • Keywords:
    Hydrogen storage, Amide, Solid state reaction, Nitride, METAL NITRIDES, TEMPERATURE, ACTIVATION, CATALYST, HYDRIDES, IMIDES, LINH2
  • Addresses:
    Nayebossadri, S
    Queen Mary Univ London
    Sch Engn & Mat Sci
    London
    E1 4NS
    England
Abstract
Solid state reaction between LiNH2 and LiH potentially offers a practical pathway for hydrogen supply to fuel cell powered vehicles, particularly if the reaction kinetics can be further improved. Here we performed a comparative study of the effects of selected micron and nano-sized nitrides using temperature programmed desorption, mass spectrometry, x-ray diffraction and infrared spectroscopy. It was found that both micron and nano-sized BN and TiN act as effective catalysts within the system. While an increase in the concentration of TiN reduces dehydrogenation temperature, the opposite was observed for BN catalyst. Employment of both nano and micron-sized BN catalysts resulted in an almost similar dehydrogenation temperature; but dehydrogenation temperature was decreased about 20 degrees C by switching from micron to nano-sized TiN. The catalytic effects of the additives were proposed to be an improvement of surface reactivity and diffusion enhancement across the interface of the reactants. However, the role of BN and TiN are different in the way that TiN is likely to improve the surface reactivity of LiNH2, while BN mainly enhances diffusion across the interface of the reactants. Our findings also indicate that TiCl3 behaves like TiN, as a catalyst in Li-N-H system. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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