Oxygen gas evolution on boron-doped diamond electrode in molten chloride systems

Faradaic oxygen gas evolution occurred without dissolution of anode material according to the reaction O2--> 1/2O(2)up arrow+2e(-) when a boron-doped diamond electrode is anodically polarized at a potential of 2.5 to 3.5 V vs Li+/Li in a LiCl-KCl melt containing Li2O at 723 K.