Abstract
In this work, the dehydrogenation kinetics of the 2LiBH 4 + MgH 2 composite under different hydrogen back pressures was studied. The applied hydrogen back pressure significantly influenced the hydrogen release rate of the uncatalyzed composite. Higher hydrogen pressures enhanced the nucleation of MgB 2, resulting in better dehydrogenation kinetics and cycle stability. The composite with a CuCl 2 catalyst demonstrated significantly improved dehydrogenation kinetics because the nucleation of MgB 2 was promoted by heterogeneous nuclei. However, similar effects of hydrogen back pressure on dehydrogenation kinetics were also observed for the CuCl 2-catalyzed composite. The extraordinary results suggest that hydrogen back pressure plays an indispensable role in the formation of MgB 2, which determines not only the reaction pathway but also the kinetics of dehydrogenation for the 2LiBH 4 + MgH 2 composite.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call