Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method.
CoTiO3 that was synthesised via the solid-state method was effective in ameliorating the desorption behaviour of NaAlH4. The initial desorption temperature of NaAlH4 catalysed by different weight percentage of CoTiO3 (5 wt%, 10 wt%, 15 wt% and 20 wt%) was dramatically decreased to around 130–160 °C...
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my.utm.1062142024-06-20T02:10:43Z http://eprints.utm.my/106214/ Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. Ali, N. A. Ismail, M. Nasef, M. M. Jalil, A. A. TP Chemical technology CoTiO3 that was synthesised via the solid-state method was effective in ameliorating the desorption behaviour of NaAlH4. The initial desorption temperature of NaAlH4 catalysed by different weight percentage of CoTiO3 (5 wt%, 10 wt%, 15 wt% and 20 wt%) was dramatically decreased to around 130–160 °C for the first desorption stage and decreased to around 182–198 °C for the second desorption stage, which is lower than milled NaAlH4. The composite sample also exhibits 15–18 times faster desorption kinetics at 150 °C where the NaAlH4-CoTiO3 composite could release 3.0–3.7 wt% of H2 in 60 min but milled NaAlH4 only could release 0.2 wt% H2 in the same time duration. The activation energies for the two-desorption stage of NaAlH4 was downshifted to 85.5 and 91.6 kJ/mol, lowered by 30.7 and 35.5 kJ/mol than milled NaAlH4, respectively. The beneficial catalytic effect of CoTiO3 can be attributed to the in-situ formation of Al-Co and Al-Ti alloys after the desorption process of the NaAlH4-CoTiO3 system. These findings pave the way for the development of highly effective catalysts for NaAlH4 as a favourable material for hydrogen storage. Elsevier Ltd. 2023-02-10 Article PeerReviewed Ali, N. A. and Ismail, M. and Nasef, M. M. and Jalil, A. A. (2023) Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. Journal of Alloys and Compounds, 934 (167932). NA-NA. ISSN 0925-8388 http://dx.doi.org/10.1016/j.jallcom.2022.167932 DOI: 10.1016/j.jallcom.2022.167932 |
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CoTiO3 that was synthesised via the solid-state method was effective in ameliorating the desorption behaviour of NaAlH4. The initial desorption temperature of NaAlH4 catalysed by different weight percentage of CoTiO3 (5 wt%, 10 wt%, 15 wt% and 20 wt%) was dramatically decreased to around 130–160 °C for the first desorption stage and decreased to around 182–198 °C for the second desorption stage, which is lower than milled NaAlH4. The composite sample also exhibits 15–18 times faster desorption kinetics at 150 °C where the NaAlH4-CoTiO3 composite could release 3.0–3.7 wt% of H2 in 60 min but milled NaAlH4 only could release 0.2 wt% H2 in the same time duration. The activation energies for the two-desorption stage of NaAlH4 was downshifted to 85.5 and 91.6 kJ/mol, lowered by 30.7 and 35.5 kJ/mol than milled NaAlH4, respectively. The beneficial catalytic effect of CoTiO3 can be attributed to the in-situ formation of Al-Co and Al-Ti alloys after the desorption process of the NaAlH4-CoTiO3 system. These findings pave the way for the development of highly effective catalysts for NaAlH4 as a favourable material for hydrogen storage. |
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Article |
author |
Ali, N. A. Ismail, M. Nasef, M. M. Jalil, A. A. |
author_facet |
Ali, N. A. Ismail, M. Nasef, M. M. Jalil, A. A. |
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Ali, N. A. |
title |
Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. |
title_short |
Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. |
title_full |
Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. |
title_fullStr |
Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. |
title_full_unstemmed |
Enhanced hydrogen storage properties of NaAlH4 with the addition of CoTiO3 synthesised via a solid-state method. |
title_sort |
enhanced hydrogen storage properties of naalh4 with the addition of cotio3 synthesised via a solid-state method. |
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Elsevier Ltd. |
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2023 |
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http://eprints.utm.my/106214/ http://dx.doi.org/10.1016/j.jallcom.2022.167932 |
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1802977242012188672 |
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