Deep Eutectic Solvents Formed by Complex Hydrides : A New Class of Hydrogen-Rich Liquid
© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
| Publié dans: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 37 vom: 15. Sept., Seite e2502566 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Advanced materials (Deerfield Beach, Fla.) |
| Sujets: | Journal Article ammonia borane borohydride deep eutectic solvents liquid hydrogen carrier |
| Résumé: | © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH. Deep eutectic solvents (DESs) are novel mixtures that exhibit a significant depression in melting points compared to their individual components. This work finds that combining tetrabutylammonium borohydride (TBABH) with ammonia borane (AB) yields new, stable, hydrogen-rich liquids under ambient conditions, with a glass transition as low as -50 °C. Liquid mixtures containing up to 6.9 wt% hydrogen can be easily obtained through physical grinding. The strong interaction between the BH4 - anion of TBABH and AB coupled with the vibration dynamics of the alkyl chains accounts for the sharp decrease in melting point. The eutectic point is identified at a TBABH-AB molar ratio of 1-2. Increasing the AB ratio further reduces the glass transition temperature but also induces a cold crystallization phenomenon. These mixtures can release hydrogen at temperatures as low as 60 °C, making them promising candidates for hydrogen storage. This represents the first example of a hydride-based DES, advancing research on complex hydrides and opening the door to the discovery of new hydrogen-rich liquids for various applications |
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| Description: | Date Revised 21.09.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202502566 |