Ok I may be off track here but has this procedure not already been accomplished by the producers of welding machines that electrolyze water to create HHO? I may be wrong but these setups probably already separate the H and O so the welding can be done with pure hydrogen. The only difference is that the welders are usually made to run on 120-240v but that isn't much of a problem to overcome.
So, does anyone here know about these welding machines? Here is one:
http://www.avantcom.ru/eng/detail/43