Aluminum-gallium composite for clean efficient hydrogen fuel
phys.orgMaybe if they have easy efficient way to recycle gallium, which they don't mention.
Sodium hydroxide is very cheap chemical that can be used instead to get hydrogen with aluminium, and unlike gallium don't have to be recycled. Perhaps the whole "get hydrogen from aluminium scrap" thing does not make economical sense anyway.
”The gallium was easily recovered for reuse after the reaction, which yields 90% of the hydrogen that could theoretically be produced from reaction of all the aluminum in the composite.”
”Although gallium is not abundant and is relatively expensive, it can be recovered and reused multiple times without losing effectiveness, Singaram said.”
I meant, how it is done?