Electrocatalysts of Pt-TiO₂Prepared by Sol-gel and Microwave-assisted Polyol Method for the Oxygen Reduction Reaction in 0.5 M H₂SO₄

Electrocatalysts of Pt-TiO2 were prepared by sol-gel and microwave assisted polyol method for the oxygen reduction reaction in acid media. The prepared electrocatalysts were morphologically and structurally characterized by X-Ray Diffraction, Scanning Electronic Microscopy and EDX analysis. Cyclic voltammetry and rotating disk electrode techniques were employed for electrocatalytic evaluation. It was found that electrocatalysts consisted of crystalline particles with nanometric size, and those obtained at pH = 9 showed an acceptable activity for the oxygen reduction reaction in acid media.