eng Science and Education Publishing American Journal of Materials Science and Engineering 2333-4673 2015-07-27 3 1 15 20 10.12691/ajmse-3-1-4 AJMSE2015314 article Ozlem Sahin 1 Hilal Kivrak hilalkivrak@gmail.com, hilalkivrak@yyu.edu.tr 2 Mustafa Karaman 2 Dilan Atbas 2 Chemical Engineering Department, Selcuk University, Konya, Turkey Chemical Engineering Department, Yüzüncü Yıl University, Van Turkey 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. http://pubs.sciepub.com/ajmse/3/1/4/ajmse-3-1-4.pdf Pt-Ir alcohol electrooxidation fuel cells CV CA impedance