High capacity hydrogen storage in a hybrid ammonia borane-lithium amide material

作者：Graham K R^*; Kemmitt T; Bowden M E

来源：Energy & Environmental Science, 2009, 2(6): 706-710.

DOI：10.1039/b901082c

The direct (solventless) reaction of lithium amide with ammonia borane is described and is demonstrated to form a new hybrid material approximating to LiNH(2)BH(3)NH(3). This material rapidly loses 3.2 mole equivalents of hydrogen, (11.9 wt%) on heating to 250 degrees C, with the most rapid hydrogen release occurring at temperatures as low as 60 degrees C. The product was an insoluble, amorphous polymer with the general formula -(NLi-BNH(2))(n)- which did not rehydrogenate directly on exposure to hydrogen gas pressure. The hybrid material and its decomposition products were characterised by solid state (11)B NMR. Selective deuterium labelling helped to elucidate a reaction sequence for the hydrogen release using mass spectrometry of the released gases.

• 出版日期2009