期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 17, 页码 10779-10786出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.05.132
关键词
Hydrogen storage; Kinetics; In-situ; High pressure
资金
- Australian Research Council [DP0877155, LE0775551, LE0989180]
- International Aluminium Institute
- Australian government
- Australian Institute of Nuclear Science and Engineering (AINSE)
- Curtin Strategic Research Capacity
- Australian Research Council [LE0989180, DP0877155] Funding Source: Australian Research Council
Magnesium silicide (Mg2Si) 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 Mg2Si under hydrogen gas to form MgH2 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 Mg2Si under both hydrogen and deuterium gas up to temperatures of 350 degrees C and pressures of 1850 bar. Even under these extreme absorption conditions Mg2Si does not absorb any measureable quantity of hydrogen or deuterium. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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