Kinetic limitations in the Mg-Si-H system
Magnesium silicide (Mg2Si) has attracted interest as a hydrogen storage material due to favorable thermodynamics (ΔHdesorption = 36 kJ/mol H2) 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 bee...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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Elsevier Ltd
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/40272 |
| _version_ | 1848755823924215808 |
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| author | Paskevicius, Mark Sheppard, Drew Chaudhary, A. Webb, C. Gray, E. Tian, Hu-Yong Peterson, V. Buckley, Craig |
| author_facet | Paskevicius, Mark Sheppard, Drew Chaudhary, A. Webb, C. Gray, E. Tian, Hu-Yong Peterson, V. Buckley, Craig |
| author_sort | Paskevicius, Mark |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Magnesium silicide (Mg2Si) has attracted interest as a hydrogen storage material due to favorable thermodynamics (ΔHdesorption = 36 kJ/mol H2) 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 °C and pressures of 1850 bar. Even under these extreme absorption conditions Mg2Si does not absorb any measureable quantity of hydrogen or deuterium. |
| first_indexed | 2025-11-14T09:02:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-40272 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:02:26Z |
| publishDate | 2011 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-402722017-09-13T16:09:22Z Kinetic limitations in the Mg-Si-H system Paskevicius, Mark Sheppard, Drew Chaudhary, A. Webb, C. Gray, E. Tian, Hu-Yong Peterson, V. Buckley, Craig Hydrogen storage High pressure Kinetics In-situ Magnesium silicide (Mg2Si) has attracted interest as a hydrogen storage material due to favorable thermodynamics (ΔHdesorption = 36 kJ/mol H2) 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 °C and pressures of 1850 bar. Even under these extreme absorption conditions Mg2Si does not absorb any measureable quantity of hydrogen or deuterium. 2011 Journal Article http://hdl.handle.net/20.500.11937/40272 10.1016/j.ijhydene.2011.05.132 Elsevier Ltd restricted |
| spellingShingle | Hydrogen storage High pressure Kinetics In-situ Paskevicius, Mark Sheppard, Drew Chaudhary, A. Webb, C. Gray, E. Tian, Hu-Yong Peterson, V. Buckley, Craig Kinetic limitations in the Mg-Si-H system |
| title | Kinetic limitations in the Mg-Si-H system |
| title_full | Kinetic limitations in the Mg-Si-H system |
| title_fullStr | Kinetic limitations in the Mg-Si-H system |
| title_full_unstemmed | Kinetic limitations in the Mg-Si-H system |
| title_short | Kinetic limitations in the Mg-Si-H system |
| title_sort | kinetic limitations in the mg-si-h system |
| topic | Hydrogen storage High pressure Kinetics In-situ |
| url | http://hdl.handle.net/20.500.11937/40272 |