Abstract: The eletrocatalytic capability of Pt, Ti base RuO2 (Ti/RuO2), and Ti base SnO2 (Ti/SnO2) electrodes was evaluated with cyclic voltammetry (CV) and Tafel curves. CV curves of the three electrodes were measured in 500 mg/L phenol solution, and their phenol oxidation peak potentials were around 0.93, 0.95, and 1.40 V (vs Ag/AgCl), respectively. The capability of direct electrocatalytic oxidation of phenol lied in the sequence of Pt＜Ti/SnO2＜Ti/RuO2. The Tafel curves were measured in 0.1 mol/L H2SO4 and the results showed that the oxygen evolution overpotentials of the three electrodes increased in the order Ti/RuO2

Key words: electrocatalysis, anode, cyclic voltammetry, Tafel curve, hydroxyl radical, phenol, degradation