Electrocatalytic activity of porous nanostructured Fe/Pt-Fe electrode for methanol electrooxidation in alkaline media |
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| Authors: | Javad Hosseini Mehdi Abdolmaleki Hamid Reza Pouretedal Mohammad Hossein Keshavarz |
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| Institution: | 1. a Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr, Isfahan, Iran;2. Faculty of Science, Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran |
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| Abstract: | An electrochemical approach to fabricate a nanostructured Fe/Pt-Fe catalyst through electrodepo-sition followed by galvanic replacement is presented. An Fe/Pt-Fe nanostructured electrode was prepared by deposition of Fe-Zn onto a Fe electrode surface, followed by replacement of the Zn by Pt at open-circuit potential in a Pt-containing alkaline solution. Scanning electron microscopy and energy-dispersive X-ray techniques reveal that the Fe/Pt-Fe electrode is porous and contains Pt. The electrocatalytic activity of the Fe/Pt-Fe electrode for oxidation of methanol was examined by cyclic voltammetry and chronoamperometry. The electrooxidation current on the Fe/Pt-Fe catalyst is much higher than that on flat Pt and smooth Fe catalysts. The onset potential and peak potential on the Fe/Pt-Fe catalyst are more negative than those on flat Pt and smooth Fe electrodes for methanol electrooxidation. All results show that this nanostructured Fe/Pt-Fe electrode is very attractive for integrated fuel cell applications in alkaline media. |
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| Keywords: | Methanol electro-oxidation Nanostructured Fe/Pt-Fe Electrocatalytic behavior Galvanic replacement Cyclic voltammetry Direct methanol fuel cell |
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