Electro-oxidation of methanol catalysed by porous nanostructured Fe/Pd-Fe electrode in alkaline medium

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• 作者：Javad Hosseini ; Mehdi Abdolmaleki…
• 关键词：Methanol ; Porous nanostructured Fe/Pt–Fe ; Electrocatalytic activity ; Galvanic replacement ; Cyclic voltammetry ; Direct methanol fuel cell
• 刊名：Journal of the Iranian Chemical Society
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：13
• 期：5
• 页码：815-822
• 全文大小：948 KB
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• 作者单位：Javad Hosseini (1)
  Mehdi Abdolmaleki (2)
  Hamid Reza Pouretedal (1)
  Mohammad Hossein Keshavarz (1)
  
  1. Department of Chemistry, Malek-Ashtar University of Technology, Shahin-Shahr, Isfahan, Iran
  2. Department of Chemistry, Faculty of Science, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran
  
• 刊物主题：Analytical Chemistry; Inorganic Chemistry; Physical Chemistry; Biochemistry, general; Organic Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-2428

文摘

Nanostructured Fe/Pd-Fe catalysts are prepared first by the deposition of Fe-Zn onto the Fe electrode surface, followed by replacement of the Zn by Pd at open circuit potential in a Pd-containing alkaline solution. The surface morphology and composition of coatings are determined by scanning electron microscopy and energy dispersive X-ray techniques. The results show that the Fe/Pd-Fe coatings are porous structure and the average particle size of Pd-Fe is low, in the range of 30–80 nm. The electrocatalytic activity and stability of Fe/Pd-Fe electrodes for oxidation of methanol are examined by cyclic voltammetry and chronoamperometry techniques. The new Fe/Pd-Fe catalyst has higher electrocatalytic activity and better stability for the electro-oxidation of methanol in an alkaline media than flat Pd and smooth Fe catalysts. The onset potential and peak potential on Fe/Pd-Fe catalysts are more negative than that on flat Pd and smooth Fe electrodes for methanol electro-oxidation. All results show that the nanostructured Fe/Pd-Fe electrode is a promising catalyst towards methanol oxidation in alkaline media for fuel cell applications.