Enhanced Electrocatalytic Performance of IrOx by Employing F‐Doped TiO2 as Support towards Acidic Oxygen Evolution Reaction

Abstract F‐doped TiO 2 is developed through simple solid‐phase synthesis and innovatively employed to support IrO x nanoparticles towards acidic oxygen evolution reaction. Benefiting from the high electrical conductivity, improved electronic interaction, and well dispersing/anchoring effects of F‐TiO 2 , the IrO x /F‐TiO 2 electrocatalyst requires only 272 mV overpotential to achieve 10 mA cm −2 , accompanied with the mass activity of 320.2 A g Ir −1 @1.55 V. Moreover, the single cell voltages are only 1.662 V@1 A cm −2 and 1.749 V@2 A cm −2 when employing IrO x /F‐TiO 2 as the anode catalyst, and operates steadily for at least 240 h. Hence, low overpotential, enhanced stability and prominent catalyst utilization are simultaneously realized.