Science and Education Publishing American Journal of Materials Science and Engineering 2333-4673 3 1 2015 07 27 The Effect of Iridium Addition to Platinum on the Alcohol Electrooxidation Activity 15 20 EN Ozlem Sahin Hilal Kivrak Chemical Engineering Department, Yüzüncü Yıl University, Van Turkey Mustafa Karaman Dilan Atbas AJMSE2015314 10.12691/ajmse-3-1-4 2015 05 26 2015 07 24 2015 07 27 Pt-Ir@C and Pt@C catalysts were prepared by ethylene glycol method and tested for methanol and ethanol in H2SO4 electrolyte. The electrocatalytic activity of these electrocatalysts was investigated using cyclic voltammograms (CVs), linear sweep voltammograms (LSVs), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). Their CVs show that Pt40Ir60@C catalyst present significantly high current of methanol and ethanol oxidation compared to the other catalysts. Moreover, chronoamperometric measurements showed that the steady-state current of Pt40Ir60 catalyst was also higher than other electro-catalysts. EIS analysis shows that the impedances on both the imaginary and real axes are much lower than those of the other catalysts. As a result, electrocatalytic activity measurements indicated that the Pt40Ir60 catalyst was the most active electrode for methanol and ethanol oxidation.