American Journal of Materials Science and Engineering
ISSN (Print): 2333-4665 ISSN (Online): 2333-4673 Website: http://www.sciepub.com/journal/ajmse Editor-in-chief: Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Materials Science and Engineering. 2015, 3(1), 15-20
DOI: 10.12691/ajmse-3-1-4
Open AccessArticle

The Effect of Iridium Addition to Platinum on the Alcohol Electrooxidation Activity

Ozlem Sahin1, Hilal Kivrak2, , Mustafa Karaman1 and Dilan Atbas2

1Chemical Engineering Department, Selcuk University, Konya, Turkey

22Chemical Engineering Department, Yüzüncü Yıl University, Van Turkey

Pub. Date: July 27, 2015

Cite this paper:
Ozlem Sahin, Hilal Kivrak, Mustafa Karaman and Dilan Atbas. The Effect of Iridium Addition to Platinum on the Alcohol Electrooxidation Activity. American Journal of Materials Science and Engineering. 2015; 3(1):15-20. doi: 10.12691/ajmse-3-1-4

Abstract

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.

Keywords:
Pt-Ir alcohol electrooxidation fuel cells CV CA impedance

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