Cobaloximes are promising catalysts for the hydrogen evolution half-reaction and could be used as cathodic catalyst for renewable energy storage system. In an ideal situation, a cobaloxime would be stably attached to an electrode surface via covalent bonds, entrapment, or hydrophobic interactions and be catalytically active at neutral pH in aqueous conditions. At present, only a handful of studies have been conducted in water, and these indicate that catalytic turnover generally is restricted to acidic conditions.