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

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 emissio...

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Bibliographic Details
Published in:Electrochimica acta 2010-06, Vol.55 (16), p.4827-4835
Main Authors: Kim, Jang Mi, Joh, Han-Ik, Jo, Seong Mu, Ahn, Dong June, Ha, Heung Yong, Hong, Seong-Ahn, Kim, Soo-Kil
Format: Article
Language:English
Subjects:
Catalyst
Direct methanol fuel cell
Electrospinning
Emission analysis
Heat treatment
Inductively coupled plasma
Methyl alcohol
Nanocomposites
Nanomaterials
Nanostructure
Platinum
Pt nanowire
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Summary: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.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2010.03.036