Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System
Magnesium borohydride, Mg(BH<sub>4</sub>)<sub>2</sub>, and calcium borohydride, Ca(BH<sub>4</sub>)<sub>2</sub>, are promising materials for hydrogen storage. Mixtures of different borohydrides have been the subject of numerous researches; however, the...
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| Format: | Article |
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MDPI AG
2019-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/17/3230 |
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| author | Erika M. Dematteis Marcello Baricco |
| author_facet | Erika M. Dematteis Marcello Baricco |
| author_sort | Erika M. Dematteis |
| collection | DOAJ |
| description | Magnesium borohydride, Mg(BH<sub>4</sub>)<sub>2</sub>, and calcium borohydride, Ca(BH<sub>4</sub>)<sub>2</sub>, are promising materials for hydrogen storage. Mixtures of different borohydrides have been the subject of numerous researches; however, the whole Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> system has not been investigated yet. In this study, the phase stability and the hydrogen desorption were experimentally investigated in the Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> system, by means of XRD, ATR-IR, and HP-DSC. Mg(BH<sub>4</sub>)<sub>2</sub> and Ca(BH<sub>4</sub>)<sub>2</sub> are fully immiscible in the solid state. In the mechanical mixtures, thermal decomposition occurs at slightly lower temperatures than for pure compounds. However, they originate products that cannot be identified by XRD, apart from Mg and MgH<sub>2</sub>. In fact, amorphous phases or mixtures of different poorly crystalline or nanocrystalline phases are formed, leading to a limited reversibility of the system. |
| first_indexed | 2024-04-11T20:57:24Z |
| format | Article |
| id | doaj.art-7cf234f04c9642cc98bfd399bb6c2f5d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:57:24Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7cf234f04c9642cc98bfd399bb6c2f5d2022-12-22T04:03:38ZengMDPI AGEnergies1996-10732019-08-011217323010.3390/en12173230en12173230Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> SystemErika M. Dematteis0Marcello Baricco1Department of Chemistry and Inter-departmental Center Nanostructured Interfaces and Surfaces (NIS), University of Turin, Via Pietro Giuria 7, 10125 Torino, ItalyDepartment of Chemistry and Inter-departmental Center Nanostructured Interfaces and Surfaces (NIS), University of Turin, Via Pietro Giuria 7, 10125 Torino, ItalyMagnesium borohydride, Mg(BH<sub>4</sub>)<sub>2</sub>, and calcium borohydride, Ca(BH<sub>4</sub>)<sub>2</sub>, are promising materials for hydrogen storage. Mixtures of different borohydrides have been the subject of numerous researches; however, the whole Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> system has not been investigated yet. In this study, the phase stability and the hydrogen desorption were experimentally investigated in the Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> system, by means of XRD, ATR-IR, and HP-DSC. Mg(BH<sub>4</sub>)<sub>2</sub> and Ca(BH<sub>4</sub>)<sub>2</sub> are fully immiscible in the solid state. In the mechanical mixtures, thermal decomposition occurs at slightly lower temperatures than for pure compounds. However, they originate products that cannot be identified by XRD, apart from Mg and MgH<sub>2</sub>. In fact, amorphous phases or mixtures of different poorly crystalline or nanocrystalline phases are formed, leading to a limited reversibility of the system.https://www.mdpi.com/1996-1073/12/17/3230complex hydridesmagnesium borohydridecalcium borohydridehydrogen storagephase diagram |
| spellingShingle | Erika M. Dematteis Marcello Baricco Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System Energies complex hydrides magnesium borohydride calcium borohydride hydrogen storage phase diagram |
| title | Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System |
| title_full | Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System |
| title_fullStr | Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System |
| title_full_unstemmed | Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System |
| title_short | Hydrogen Desorption in Mg(BH<sub>4</sub>)<sub>2</sub>-Ca(BH<sub>4</sub>)<sub>2</sub> System |
| title_sort | hydrogen desorption in mg bh sub 4 sub sub 2 sub ca bh sub 4 sub sub 2 sub system |
| topic | complex hydrides magnesium borohydride calcium borohydride hydrogen storage phase diagram |
| url | https://www.mdpi.com/1996-1073/12/17/3230 |
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