It seems like we were talking about how to seperate H from O a while back. I'm not sure if you remember, But I was talking to someone about How to do it, I'm thinking it was you I was talking to.
U or I mentioned that you could Pass HHO across metal shavings that had been heated, And that the heat would speed up the oxidation of the metal and it would rust quicker, Removing the Oxygen leaving the hydrogen.
I picked up some metal shavings from a Break Disk rotor machine, I never got around to testing it out.
I was just wondering If you remembered that, Or if it would be a possible option for you.