Preparation and characterization of Pt nanowire by electrospinning method for methanol oxidation

Jang Mi Kim, Han Ik Joh, Seong Mu Jo, Dong June Ahn, Heung Yong Ha, Seong Ahn Hong, Soo Kil Kim

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Pt nanowires are prepared by treating electrospun polyvinyl pyrrolidone (PVP)-Pt composite fibers at high temperatures in an air atmosphere and their activities toward a methanol oxidation reaction (MOR) are investigated. Thermogravimetric analysis (TGA) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) results indicate that the electrospun PVP-Pt composite fibers thermally decompose at 250 °C, which leads to the removal of 98 wt% of the PVP polymer and the simultaneous reduction of the Pt precursor to a Pt nanowire. The physical and electrochemical properties of Pt nanowires are found to be affected by the heat treatment conditions such as heating rate, time, temperature, and atmosphere. Furthermore, polymer fibers subjected to a pyrolization process in nitrogen followed by exposure to an air atmosphere enhance the surface area of the Pt nanowires, leading to high electrochemical activity toward a MOR. The detailed physical and electrochemical properties of the Pt nanowires are characterized by various spectroscopic and electrochemical techniques, and the possibilities of using them as electrocatalysts in a fuel cell are explored.

Original languageEnglish
Pages (from-to)4827-4835
Number of pages9
JournalElectrochimica Acta
Volume55
Issue number16
DOIs
Publication statusPublished - 2010 Jun 30

Keywords

  • Catalyst
  • Direct methanol fuel cell
  • Electrospinning
  • Heat treatment
  • Pt nanowire

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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