Inexpensive green hydrogen production from aluminum-water reaction.

Aluminum has proven to be an effective, safe, and practical means of storing and generating hydrogen gas; particularly attractive when high energy density is needed, and water is readily available. This study investigates the recovery and reuse of a 5 wt.% gallium-indium eutectic used as a surface coating to disrupt the passivation layer, allowing the aluminum to spontaneously react with water. A Honda EU1000i Generator was fueled by hydrogen produced from aluminum and water, generating 400W of electricity. A hydrogen yield of 99% was achieved, with 99% of the gallium-indium liquid metal eutectic recovered and reused.