Mechanical milling of Mg, Ni and Y powder mixture and investigating the effects of produced nanostructured MgNi4Y on hydrogen desorption properties of MgH2

Effect of Synthesized MgNi4Y Catalyst on Hydrogen Desorption Properties of Milled MgH2

“…It is reported that particle size of MgH 2 + 10 wt pct MgNi 4 Y after 5 hours of ball milling was about 330 nm which was slightly lower than that of MgH 2 alone (364 nm) in the same milling condition. [17] Similar results of Pourabdoli and his coworkers [16] showed that particle size of MgH 2 -10 wt pct 9Ni-2Mg-Y powder was almost equal to that of MgH 2 after 20 hours of milling in similar milling condition. However, BET specific surface area of 20 hours milled MgH 2 was less than that of for 20 hours milled MgH 2 -10 wt pct 9Ni-2Mg-Y.…”

Hydrogen desorption performance of high-energy ball milled Mg 2 NiH 4 catalyzed by multi-walled carbon nanotubes coupling with TiF 3

“…It can be clearly seen from Fig. 2(b) that some agglomerates of Mg 2 NiH 4 particles composed of individual 1e2 mm size unites which were somewhat falt and faceted appeared and the average size of secondary reunion particles is about 10 mm, and such refined particles are contribute to fast kinetics of dehydrogenation due to the short diffusion path for H-atoms and large specific areas for recombination of H atoms to H 2 molecules [27]. Fig.…”

Strain tuned dehydrogenation thermodynamics of magnesium based hydride: A first principle study

“…Although nanostructuring, chemical alloying, changing reaction pathway etc. [6][7][8] have achieved positive effects in tuning the thermodynamics of MgH 2 , some limits cannot be ignored. For example, keeping stable nanostructures is difficult over repeated de/rehydrogenation, chemical alloying leads to the reduction of hydrogen storage capacity, and the reaction by changing the reaction pathway is often irreversible.…”