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

被引：57

作者：

Kim, Jang Mi ^{[1
,2
]}

Joh, Han-Ik ^{[1
]}

Jo, Seong Mu ^{[3
]}

Ahn, Dong June ^{[2
]}

Ha, Heung Yong ^{[1
]}

Hong, Seong-Ahn ^{[1
]}

Kim, Soo-Kil ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Fuel Cell Ctr, Seoul 136791, South Korea

[2] Korea Univ, Dept Chem & Biol Engn, Seoul 136701, South Korea

[3] Korea Inst Sci & Technol, Polymer Hybrid Ctr, Seoul 136791, South Korea

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 16期

关键词：

Direct methanol fuel cell; Catalyst; Pt nanowire; Electrospinning; Heat treatment; FUEL-CELLS; PLATINUM NANOPARTICLES; THERMAL-DEGRADATION; POLYMER NANOFIBERS; OXYGEN-REDUCTION; ELECTROCATALYSTS; TEMPERATURE; CATALYSTS; FIBERS; FABRICATION;

D O I：

10.1016/j.electacta.2010.03.036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 degrees 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. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4827 / 4835

页数：9

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