If you want to save my life please explain why. If been working with pure hydrogen(H2) it's a friendly gass to work with.
Ok, serious. We all know that splitting water into hydrogen and oxygen is dangerous in the first place.
Hydrogen with oxygen or HHO is very explosive and putting that combi under pressure is deadly. Simple as that.
However...
I have personally worked with H2 under pressure. I had the pleasure to buy 1 bottle for my tests years ago.
Having said that, Leon, making a cell with a zemelap, or something else that you can imaging as membrame is a different koekie.
You have NO garantie that no oxygen is leaking into the hydrogen output..
Thats a bit my worry.....
Ill gues if you would make H2 with help of a Hoffman apparatus, then you might be more safe, if you can deal with the pressure differences between the two parts.
You see, the pressure difference in a platecell with separator is not easy to keep in balance...
What are your thoughts.....?