Effect of preparation conditions on the structure and catalytic activity of carbon-supported platinum for the electrooxidation of methanol

Carbon-supported platinum catalysts (Pt/C) were prepared by treatment of PtO₂/C under different conditions: (a) heating at 380°C in air, argon and hydrogen; (b) electrochemical reduction in H₂SO₄; and (c) reduction with NaBH₄. The effect of the preparation conditions on the structure and the catalytic activity of the catalysts for the electrooxidation of CH₃OH in acid media was studied. The highest activity was achieved for the catalyst treated in air. The activity is determined by the crystal faces exposed at the particle surface as well as particle size and the partial oxidation of the carbon support.