Institut für Organische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Gießen (Germany).
Angew Chem Int Ed Engl. 2015 Dec 14;54(51):15556-9. doi: 10.1002/anie.201508360. Epub 2015 Nov 5.
The storage of energy in a safe and environmentally benign way is one of the main challenges of today's society. Ammonia-borane (AB=NH3 BH3 ) has been proposed as a possible candidate for the chemical storage of hydrogen. However, the efficient release of hydrogen is still an active field of research. Herein, we present a metal-free bis(borane) Lewis acid catalyst that promotes the evolution of up to 2.5 equivalents of H2 per AB molecule. The catalyst can be reused multiple times without loss of activity. The moderate temperature of 60 °C allows for controlling the supply of H2 on demand simply by heating and cooling. Mechanistic studies give preliminary insights into the kinetics and mechanism of the catalytic reaction.
以安全且对环境无害的方式储存能源是当今社会面临的主要挑战之一。氨硼烷（AB=NH3 BH3）已被提议作为储氢的一种可能的候选物质。然而，高效释放氢气仍然是一个活跃的研究领域。在此，我们提出了一种无金属双（硼烷）路易斯酸催化剂，可促进每摩尔 AB 分子释放高达 2.5 当量的氢气。该催化剂可以多次重复使用而不会失去活性。适中的 60°C 温度允许通过简单地加热和冷却来按需控制氢气的供应。机理研究初步揭示了催化反应的动力学和机理。
