Good articles.
Regarding aluminium for hydrogen, there's considerable potential but some caution needed, too:
Quote:
The composite can be made with readily available sources of aluminum, including used foil or cans, and the composite can be stored for long periods by covering it with cyclohexane to protect it from moisture.
Although gallium is not abundant and is relatively expensive, it can be recovered and reused multiple times without losing effectiveness, Singaram said. It remains to be seen, however, if this process can be scaled up to be practical for commercial hydrogen production.
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It would be very cool if your waste aluminium foil or drink cans could generate hydrogen! (I'm envisaging a "Mr Fusion" style of generator .... who knows, maybe?)