That doesn't sound hopeful to me, unless the Aluminium is only used catalytically.
It takes masses of power just to make Aluminium in the first place, there's a reason it's called "Congealed Electricity".
And not to mention that it has to be pure aluminum metal, which is very reactive with air and forms a non-reactive aluminum oxide layer. So there is also having to keep it in some sort of inert environment. Us chemist have been using that method for years to produce hydrogen for very specific synthesis. But I do not see it being economically vial, or not produce an energy deficiency.
Just because you can do something does not mean you should or it is better.
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