A platinum anode (3) and a cathode (4) are mounted coaxially on the holder (2).

The electrochemical cell (140, 210) may include a gold cathode (145, 220) and a platinum anode (144, 230).

Pons and Fleischmann did heavy-water electrolysis with a palladium cathode and a platinum anode.

Fleischmann and Pons did heavy water electrolysis with a palladium cathode and platinum anode.

The membranes may be made by solvent casting, conveniently to a thickness of 10 to 40 νm, and used in electrolytic systems with a platinum anode.