Nano-confined ammonia borane for chemical hydrogen storage

There is a great demand for a sufficient and sustainable energy supply. Hence, the search for applicable hydrogen storage materials is extremely important owing to the diversified merits of hydrogen energy. In this regard, ammonia borane (NH ₃BH ₃, AB) containing 19. 6 wt-% hydrogen has been considered as a promising material for hydrogen storage applications to realize the "hydrogen economy", but with limits from slow kinetics of hydrogen release and by-product of trace gases such as ammonia and borazine. In this review, we introduce the recent research on AB, regarding to the nanoconfinement effect on improving the kinetics at a relatively low temperature and the prevention/reduction of undesirable gas formation.