Preparation and characterization of Pt nanowire by electrospinning method for methanol oxidation
- Preparation and characterization of Pt nanowire by electrospinning method for methanol oxidation
- 김장미; 조한익; 조성무; 안동준; 하흥용; 홍성안; 김수길
- Direct methanol fuel cell; Catalyst; Pt nanowire; Electrospinning; Heat treatment
- Issue Date
- Electrochimica acta
- VOL 55, NO 16, 4827-4835
- 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 ℃, 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.
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