Interesting article and prospects for similar chemical concoctions with more available agents, i.e., more available than gallium, might ensue.

Sounds like what we used to do as kids to fuel lighter than air balloons by mixing aluminium and water with lye.  Produced hydrogen also, I believe, but was probably dangerous and also yielded noxious fumes.

I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears