%0 journal article
%@ 0360-3199
%A Nwakwuo, C.C., Pistidda, C., Dornheim, M., Hutchison, J.L., Sykes, J.M.

%D 2012
%J International Journal of Hydrogen Energy
%N 3
%P 2382-2387 
%R doi:10.1016/j.ijhydene.2011.10.070
%T Microstructural study of hydrogen desorption in 2NaBH4 + MgH2 reactive hydride composite
%U https://doi.org/10.1016/j.ijhydene.2011.10.070
3 
%X The desorption mechanism of as-milled 2NaBH4 + MgH2 was investigated by volumetric analysis, X-ray diffraction and electron microscopy. Hydrogen desorption was carried out in 0.1 bar hydrogen pressure from room temperature up to 450 °C at a heating rate of 3 °C min−1. Complete dehydrogenation was achieved in two steps releasing 7.84 wt.% hydrogen. Desorption reaction in this system is kinetically restricted and limited by the growth of MgB2 at the Mg/Na2B12H12 interface where the intermediate product phases form a barrier to diffusion. During desorption, MgB2 particles are observed to grow as plates around NaH particles.