Oxygen Electrocatalysis on the Pt-Modified Carbon: Influence of KOH Concentration

Oxygen reduction reaction in alkaline solutions at various carbons (C(Mo2C), Vulcan), and carbon supports, activated with 20wt% Pt-nanoparticles has been studied in 0.1 M and 1.0 M KOH aqueous solutions. Experimental data show important contribution from the C(Mo2C) carbon support to the reduction kinetics of oxygen. Scanning electron microscopy, X-ray diffraction, electrochemical cyclic voltammetry and rotating disc electrode experiments have been carried out to characterize the structure and electrochemical behavior of materials prepared.