Oxidation of cyanide ions at a Ti/Co3O4 electrode in aqueous base solution has been investigated. The cyclic voltammetric curve for the oxidation of cyanide at Ti/Co3O4 shows a well formed wave prior to oxygen evolution at a potential where the spinel surface itself undergoes oxidation. Using a flow cell it is confirmed that the conversion of cyanide (CN-) to cyanate (CNO-) can be achieved galvanostatically with a reasonable current efficiency. As an example, at a current density of 100 A m(-2), CN- concentration can be lowered from 10 to 0.2 mM with an electric energy consumption of about 18 kWh kg(-1) of CN- oxidized and a global current efficiency of 28.5%. The oxide coating appears to be quite stable during repeated electrolyses.