Abstract
New method of hydrogen production by mechano-chemical reaction of various metals (Al, Si, Fe, Ni, Pb, Ti, Cu, Cr and Co) with water was investigated. Capacity of hydrogen production were correlated to the standard free energy (⊿G°) of metal oxides formation. It was revealed that aluminum had the highest hydrogen production capability among various metals. However, there was a long induction period in the reaction of Al with water. This induction period was decreased by the addition of high hardness materials such as SiC and Cr. It was concluded that the oxide layer on Al surface was effectively destroyed by the increase of collision frequency between Al particles and high hardness materials.
