Dehydrogenation and hydrogenation characteristics of MgH2 with transition metal fluorides |
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| Authors: | Seon-Ah Jin Jae-Hyeok Shim Young Whan Cho Kyung-Woo Yi |
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| Affiliation: | 1. Materials Science and Technology Research Division, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;2. Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea |
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| Abstract: | The effect of transition metal fluorides on the dehydrogenation and hydrogenation of MgH2 has been investigated. Many of the fluorides show a considerable catalytic effect on both the dehydrogenation temperature and hydrogenation kinetics of MgH2. Among them, NbF5 and TiF3 most significantly enhance the hydrogenation kinetics of MgH2. It is suggested that hydride phases formed by the reaction between MgH2 and these transition metal fluorides during milling and/or hydrogenation play a key role in improving the hydrogenation kinetics of MgH2. |
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| Keywords: | Hydrogen storage Magnesium hydride Transition metal fluoride Ball milling Catalysis Reaction kinetics |
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