somthing old to newley look at

[dave]

http://en.wikipedia.org/wiki/Electrolysis_of_water

[Painless]

An interesting read.

[mario brito]

High-temperature electrolysis (also HTE or steam electrolysis) is a method currently being investigated for water electrolysis with a heat engine. High temperature electrolysis is more efficient than traditional room-temperature electrolysis because some of the energy is supplied as heat, which is cheaper than electricity, and because the electrolysis reaction is more efficient at higher temperatures.

very interesting ! engine = heat... heat = better electrolysis... but heat = water steam... hmmmmm...maybe finding a true balance between this is the key