Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition.
Magnesium hydride (MgH2) is the most feasible and effective solid-state hydrogen storage material, which has excellent reversibility but initiates decomposing at high temperatures and has slow kinetics performance. Here, zinc titanate (Zn2TiO4) synthesised by the solid-state method was used as an ad...
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KeAi Communications Co.
2023
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my.utm.1068242024-07-28T06:48:48Z http://eprints.utm.my/106824/ Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. Ali, N. A. Sazelee, N. A. Md. Din, M. F. Nasef, M. M. Jalil, A. A. Liu, Haizen Ismail, M. TP Chemical technology Magnesium hydride (MgH2) is the most feasible and effective solid-state hydrogen storage material, which has excellent reversibility but initiates decomposing at high temperatures and has slow kinetics performance. Here, zinc titanate (Zn2TiO4) synthesised by the solid-state method was used as an additive to lower the initial temperature for dehydrogenation and enhance the re/dehydrogenation behaviour of MgH2. With the presence of Zn2TiO4, the starting temperature for the dehydrogenation of MgH2 was remarkably lowered to around 290 °C–305 °C. In addition, within 300 s, the MgH2–Zn2TiO4 sample absorbed 5.0 wt.% of H2 and 2.2–3.6 wt.% H2 was liberated from the composite sample in 30 min, which is faster by 22–36 times than as-milled MgH2. The activation energy of the MgH2 for the dehydrogenation process was also downshifted to 105.5 kJ/mol with the addition of Zn2TiO4 indicating a decrease of 22% than as-milled MgH2. The superior behaviour of MgH2 was due to the formation of MgZn2, MgO and MgTiO3, which are responsible for ameliorating the re/dehydrogenation behaviour of MgH2. These findings provide a new understanding of the hydrogen storage behaviour of the catalysed-MgH2 system. KeAi Communications Co. 2023-06 Article PeerReviewed application/pdf en http://eprints.utm.my/106824/1/MMNasef2023_AmelioratingtheReDehydrogenationBehaviour_compressed.pdf Ali, N. A. and Sazelee, N. A. and Md. Din, M. F. and Nasef, M. M. and Jalil, A. A. and Liu, Haizen and Ismail, M. (2023) Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. Journal of Magnesium and Alloys, 11 (6). pp. 2205-2215. ISSN 2213-9567 http://dx.doi.org/10.1016/j.jma.2023.05.005 DOI:10.1016/j.jma.2023.05.005 |
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TP Chemical technology Ali, N. A. Sazelee, N. A. Md. Din, M. F. Nasef, M. M. Jalil, A. A. Liu, Haizen Ismail, M. Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
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Magnesium hydride (MgH2) is the most feasible and effective solid-state hydrogen storage material, which has excellent reversibility but initiates decomposing at high temperatures and has slow kinetics performance. Here, zinc titanate (Zn2TiO4) synthesised by the solid-state method was used as an additive to lower the initial temperature for dehydrogenation and enhance the re/dehydrogenation behaviour of MgH2. With the presence of Zn2TiO4, the starting temperature for the dehydrogenation of MgH2 was remarkably lowered to around 290 °C–305 °C. In addition, within 300 s, the MgH2–Zn2TiO4 sample absorbed 5.0 wt.% of H2 and 2.2–3.6 wt.% H2 was liberated from the composite sample in 30 min, which is faster by 22–36 times than as-milled MgH2. The activation energy of the MgH2 for the dehydrogenation process was also downshifted to 105.5 kJ/mol with the addition of Zn2TiO4 indicating a decrease of 22% than as-milled MgH2. The superior behaviour of MgH2 was due to the formation of MgZn2, MgO and MgTiO3, which are responsible for ameliorating the re/dehydrogenation behaviour of MgH2. These findings provide a new understanding of the hydrogen storage behaviour of the catalysed-MgH2 system. |
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Article |
author |
Ali, N. A. Sazelee, N. A. Md. Din, M. F. Nasef, M. M. Jalil, A. A. Liu, Haizen Ismail, M. |
author_facet |
Ali, N. A. Sazelee, N. A. Md. Din, M. F. Nasef, M. M. Jalil, A. A. Liu, Haizen Ismail, M. |
author_sort |
Ali, N. A. |
title |
Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
title_short |
Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
title_full |
Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
title_fullStr |
Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
title_full_unstemmed |
Ameliorating the re/dehydrogenation behaviour of MgH2 by zinc titanate addition. |
title_sort |
ameliorating the re/dehydrogenation behaviour of mgh2 by zinc titanate addition. |
publisher |
KeAi Communications Co. |
publishDate |
2023 |
url |
http://eprints.utm.my/106824/1/MMNasef2023_AmelioratingtheReDehydrogenationBehaviour_compressed.pdf http://eprints.utm.my/106824/ http://dx.doi.org/10.1016/j.jma.2023.05.005 |
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13.18916 |