Question

which type of metal hydrides are used for hydrogen storage and why

Answer 1

The metal hydrides such as intermetallic alloys and solid solutions have interstitial vacancies where atomic hydrogen is absorbed via an exothermic reaction; however, by endothermic path, the metal hydridedesorbs the hydrogen reversibly at ambient to moderate temperatures.

Answer 2

$\large\underline\bold{ANSWER \red{\huge{\checkmark}}}$

The metal hydrides such as intermetallic alloys and solid solutions have interstitial vacancies where atomic hydrogen is absorbed via an exothermic reaction; however, by endothermic path, the metal hydridedesorbs the hydrogen reversibly at ambient to moderate temperatures.