Structure, morphology and hydrogen storage kinetics of nanocomposite MgH2/10 wt% ZrNi5 powders

Catalytic effect of SrTiO3 on the hydrogen storage behaviour of MgH2

“…The additive has acted as a catalyst with no changes on the thermodynamics of the system which similar to other works on doped MgH 2 as reported in [12,25,39] .…”

“…Finally, El-Eskandarany et al . [25] had studied the catalytic effect of ZrNi 5 powder. The powder, which was stable and not reacted with the MgH 2 was able to reduce the activation energy of the MgH 2 to 110.1 kJ/mol.…”

Recent developments in the fabrication, characterization and implementation of MgH2-based solid-hydrogen materials in the Kuwait Institute for Scientific Research

“…This minor degradation took place because the slight grain growth came off in the Mg/Mn 3.6 Ti 2.4 grains, as indicated in Fig. 13f and g. 88 More recently, nanocomposite MgH 2 /10 wt% ZrNi 5 powders were fabricated in KISR by RBM the synthesized nanocrystalline MgH 2 with 10 wt% of arc-melt ZrNi 5 powders for 50 h. 89 Fig. 14 displays the temperature and time effects on the hydrogen absorption (a and b) and the consequent desorption (c and d) kinetics of the nanocomposite MgH 2 /10 wt% ZrNi 5 powders obtained aer 50 h of ball milling time.…”

“…88) and ZrNi 5 (ref. 89) alloys showed a good potential for use as catalysts. The end-product of the MgH 2 /7 Mn 3.6 Ti 2.4 nanocomposite powders obtained aer 50 h of RBM were aggregated to form particles with an apparent particle size of about 250 nm in diameter (Fig.…”

“…This hydrogen storage nanocomposite system revealed a good cyclability (600 complete cycles), conducted at 275 C without serious kinetic degradation. 89 5.1.6 Catalyzation with metastable phases of Zr-based nanopowders. The idea of utilizing Zr-based metastable phases for improving the hydrogenation and dehydrogenation kinetics of MgH 2 systems dates back to 2015, when El-Eskandarany et al 11 doped the hydride phase with 10 wt% of big-cube Zr 2 Ni nanopowders.…”