Titanium electrodes coated by transition metal oxides have shown a large number of applications, thus being the subject of constant research and improvement. One of the most important applications for this type of electrodes is the electro-generation of hydroxyl radicals (^•OH) and hydrogen peroxide (H₂O₂) via catalytic water oxidation to the electrochemical degradation of organic compounds, as phenol (Phen). Looking for improving the electrochemical performance of IrO₂-Ta₂O₅|Ti and RuO₂-Ta₂O₅|Ti electrodes and also provide a better understand about their electrochemical behavior at an interfacial approach, this investigation was focused to compare the electro catalytic removal efficiency of Phen using different Ir:Ta and Ru:Ta ratios at the coating (70:30 and 30:70) by the generation of ^•OH and H₂O₂ in acid conditions (H₂SO₄).