Facile Synthesis of Composite Electrodes Containing Platinum Particles Distributed in Nanowires of Polyaniline-Poly(Acrylic Acid) for Methanol Oxidation

作者：Kuo Chung Wen^*; Yang Chang Cian; Wu Tzi Yi

来源：International Journal of Electrochemical Science, 2011, 6(8): 3196-3209.

• Polyaniline
• poly(acrylic acid)
• nanowires
• cyclic voltammetry
• TEM
• methanol oxidation

This work demonstrates a novel and simple route for preparing a composite that comprises platinum (Pt) nanoparticles and polyaniline (PANI) doped with poly(acrylic acid) (PAA) and hydrochloric acid (HCl) via "simultaneous doping-deposition" to obtain PANI-(PAA+HCl)-Pt composite electrodes. PANI-(PAA+ HCl) is characterized using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). XPS results indicate that PANI-(PAA+ HCl) has more positively charged nitrogen atoms compared to PANI doped with HCl (PANI-HCl). SEM images reveal that PANI-(PAA+ HCl) is composed of highly porous nanowires. The morphology and structure of the PANI-(PAA+ HCl)-Pt composite are further characterized by transmission electron microscopy (TEM) and Auger electron spectroscopy (AES). TEM images and AES results indicate that Pt particles are dispersed uniformly into the spatial regions of PANI-(PAA+ HCl). Cyclic voltammetry results and chronoamperometric response measurements show that PANI-(PAA+ HCl)-Pt electrodes have good electrocatalytic activity of methanol oxidation with low CO poisoning.

• 出版日期2011-8