Nano-composite Based on Platinum Particles and Modified Polyaniline for Methanol, Formic Acid, and Ethanol Oxidation

Polyaniline (PANI) is doped with poly(styrenesulfonic acid) (PSS) via a doping‐dedoping‐redoping process. Fourier transform infrared (FT‐IR) spectroscopy results confirm that PANI is doped with PSS. X‐ray photoelectron spectroscopy (XPS) results indicate that the strong interaction between Pt partic...

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Bibliographic Details
Published in:Journal of the Chinese Chemical Society (Taipei) 2014-07, Vol.61 (7), p.819-826
Main Authors: Kuo, Chung-Wen, Tsai, Cheng-Jang, Chen, Wan-Ping, Chen, Pin-Rong, Wu, Tzi-Yi, Tseng, Ching-Guey
Format: Article
Language:English
Subjects:
Acids
Atoms & subatomic particles
Cyclic voltammetry
Electrocatalytic oxidation
Electrodes
Ethanol
Nanowires
Oxidation
Polyaniline
Spectrum analysis
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Summary:Polyaniline (PANI) is doped with poly(styrenesulfonic acid) (PSS) via a doping‐dedoping‐redoping process. Fourier transform infrared (FT‐IR) spectroscopy results confirm that PANI is doped with PSS. X‐ray photoelectron spectroscopy (XPS) results indicate that the strong interaction between Pt particles and sulfonic acid groups of PANI‐PSS. Scanning electron microscopy (SEM) images reveal that PANI‐PSS is composed of highly porous nanowires. Platinum (Pt) can be deposited onto PANI‐PSS film using the potentiostatic mode to obtain PANI‐PSS‐Pt composite electrode. Transmission electron microscopy (TEM) image result indicates that Pt particles are dispersed uniformly into the electrode. The effects of concentration on electrocatalytic oxidation of ethanol, formic acid, and methanol are investigated. Cyclic voltammetry results and chronoamperometric response measurements show that the activity and stability toward methanol oxidation of the PANI‐PSS‐Pt electrode are better than those of the PANI‐PSS‐Pt electrodes toward ethanol and formic acid oxidation. Pt particles are successfully embedded into the PANI‐PSS nanowire network structure to form a PANI‐PSS‐Pt composite electrode. The anodic currents of methanol and formic acid oxidation have optimum H2SO4 concentration at 0.5 M. Cyclic voltammetry results and chronoamperometric response measurements show that the activity and stability toward methanol oxidation of the PANI‐PSS‐Pt electrode are better than those toward ethanol and formic acid oxidation.
ISSN:0009-4536
2192-6549
DOI:10.1002/jccs.201300634