This was brought up last year and nothing ever eventuated. I have been in contact with "myhydrogencar" on you tube as he has been testing Potassium Carbonate
It is a much safer catalyst than KOH or NaOH.
He has found that the production is just as good and he has been running his cell in the car for more than 3 weeks.
The only cons are 1) you need 5 times the amount as compared with KOH and 2) a slight yellowish colouring has taken place
Has anybody else tried Pottassium Carbonate and what sort of results did you get ??
I am waiting to get some Pot. Carb. to try in my generator and when I test I will post results