The military has worked on a similar concept with a metal powder + water to produce hydrogen on the fly. https://en.wikipedia.org/wiki/Aluminium-based_nanogalva

The military has worked on a similar concept with a metal powder + water to produce hydrogen on the fly. https://en.wikipedia.org/wiki/Aluminium-based_nanogalvanic_alloys https://en.wikipedia.org/wiki/Aluminium-based_nanogalvanic_a...