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Title: Kinetic limitations in the Mg-Si-H system
Authors: Paskevicius, M
Sheppard, DA
Chaudhary, AL
Webb, CJ
Gray, EMA
Tian, HY
Peterson, VK
Buckley, CE
Keywords: Hydrogen storage
Magnesium silicides
Issue Date: 1-Aug-2011
Publisher: Pergamon-Elsevier Science LTD
Citation: Paskevicius, M., Sheppard, D. A., Chaudhary, A. L., Webb, C. J., Gray, E. M., Tian, H. Y., Peterson, V. K., & Buckley, C. E. (2011). Kinetic limitations in the Mg-Si-H system. International Journal of Hydrogen Energy, 36(17), 10779-10786. doi:10.1016/j.ijhydene.2011.05.132
Abstract: Magnesium silicide (Mg(2)Si) has attracted interest as a hydrogen storage material due to favorable thermodynamics (Delta H(desorption) = 36 kJ/mol H(2)) for room temperature operation. To date, direct hydriding of Mg(2)Si under hydrogen gas to form MgH(2) and Si has only been attempted at low pressure and has been hindered by poor kinetics of absorption. In this paper we study the dehydrogenation reaction with in-situ neutron powder diffraction and present results of our attempts to hydrogenate Mg(2)Si under both hydrogen and deuterium gas up to temperatures of 350 degrees C and pressures of 1850 bar. Even under these extreme absorption conditions Mg(2)Si does not absorb any measureable quantity of hydrogen or deuterium. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd
Gov't Doc #: 3860
ISSN: 0360-3199
Appears in Collections:Journal Articles

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