Improving Effects of LiH and Co-Catalyst on the Dehydrogenation of Li₄BN₃H₁₀

Improving effects of LiH and Co-catalyst on the dehydrogenation of Li 4 BN 3 H 10 were investigated in this work. It was found that 9.6 wt % or 5 equiv. moles of H 2 can be evolved from the promoted sample at 250 °C, which is 110 °C lower than that of pristine Li 4 BN 3 H 10 . More importantly, NH 3 emission is depressed dramatically, with its concentration in hydrogen decreasing from 12 mol % to 0.008 mol % (or 80 ppm). Melting of Li 4 BN 3 H 10 is essential for one unit of LiNH 2 fleeing from the structure and interacting with LiH to evolve 1 equiv. mole of H 2, in the meantime, Co-catalyst takes effect on the dissociation of remaining Li 3 BN 2 H 8, resulting in the evolution of another 4 equiv. moles of H 2 at temperatures close to that of LiNH 2 −LiH.