Direct from the big bang - Deuterium

[Moonliner]

Originally Posted by Ghoulish Delight

Asked and answered

Unfortunately, that answer includes the fact that it requires deuterium in gaseous form, not heavy water.

I'm on it....

Wait, if you run an electric current through water, you can separate out Hydrogen gas. I did that in High School chem class. So if you run current through heavy water it seems reasonable that you would separate out Deuterium gas.