designing an optimized materials for H storage, requirements inlcude -- increased no of adsorption sites of material and increased heat of adsorption.
what does the 2nd point means?
Hydrogen binds weakly to the adsorption sites of the storage material by physisorption ( in specific van der Waals forces). To improve the storage capacity of the hydrogen in the adsorbent system either you need to have more adsorption sites or strong binding sites. I guess the second point meant that optimal hydrogen storage material must be designed according to that. The whole answer is applicable only for adsorbent storage systems.
okay, what i could understand by adsorption is that heat is released during the process, and materials which has high heat of adsorption will have better bonds with H.
this might be reason??
