Centrifugal electrospun bimetallic PtFe nanowires as electrocatalyst for oxygen reduction reaction in polymer electrolyte membrane fuel cells

Wei Hsin Chen, Yu Fan Chang, Min Hsing Chang

Research output: Contribution to journalArticlepeer-review

Abstract

The present study attempts to fabricate platinum-iron (PtFe) alloy nanowires by the technique of centrifugal electrospinning and evaluate their electrochemical performance. The polymer solution for the centrifugal electrospinning process is made by mixing polyvinylpyrrolidone (PVP) with the precursors of Pt and Fe (i.e., hexachloroplatinic acid and ferric nitrate), in which the solvent is composed of ethanol and deionized water. The resultant morphology of nanowires is evaluated by considering the effects of the three crucial operating factors: the rotating speed of the spinneret, the imposed electric field, and the nanowire composition. The results show that, under the condition of 1600 rpm of rotating speed of the spinneret and 13 kV of applied voltage with a collection distance of 12 cm, one can obtain an average 64 nm of diameter for the Pt1Fe1 nanowire. The electrochemical performance of the prepared nanowires is further evaluated. It is found that the electrochemically active surface area of Pt1Fe1 nanowires can reach 32.8 m2 g-1 which is about half of the conventional Pt/C catalyst. However, the oxygen reduction reaction (ORR) activity of Pt1Fe1 nanowires is higher than Pt/C. The nanowires also exhibit better durability in electrochemical performance compared with Pt/C. The results verify the centrifugal electrospinning is an efficient technique to prepare PtFe nanowires, which demonstrate good potential to be exploited as electrocatalysts for ORR in polymer electrolyte membrane fuel cells.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 2024

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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