2025-07-15 スイス連邦工科大学ローザンヌ校（EPFL）
＜関連情報＞
- https://actu.epfl.ch/news/new-liquid-can-simplify-hydrogen-transportation–4/
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202502566
複合水素化物によって形成される深共晶溶媒：新しい種類の水素を豊富に含む液体 Deep Eutectic Solvents Formed by Complex Hydrides: A New Class of Hydrogen-Rich Liquid
Loris Lombardo, Taichi Nishiguchi, Thi Ha My Pham, Andreas Züttel, Satoshi Horike
Advanced Materials Published: 22 June 2025
DOI:https://doi.org/10.1002/adma.202502566
Abstract
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.
