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

Abstract

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.

Promoting Effect of Chemical Self-Assembled Polyaniline Nanofibers and Electro-Polymerized Polyaniline in Formic Acid Electro-Oxidizing Reaction

“…Key issue of DFAFC commercialization is currently the fabrication of anode catalysts with highly catalytic activity and stability. For the improvement of anode performance in DFAFC, polyaniline (PANI) as a new kind of catalyst support have gained more and more attention [3][4][5][6][7][8][9][10][11][12] . PANI owns lower charge transfer resistance, more meso-porous and larger specific surface area, therefore Pd/PANI has higher activity and stability for formic acid electro-oxidizing reaction comparing with Pd/activated carbon [13][14][15] .…”

Copolymers Based on Indole-6-Carboxylic Acid and 3,4-Ethylenedioxythiophene as Platinum Catalyst Support for Methanol Oxidation

“…In recent years, conducting polymers (CPs) have been demonstrated to be suitable host materials for dispersing metallic particles [11][12][13][14]. CP matrices with porous structures, high accessible surface area, low chemical resistance and high stability are attractive and favorable supports for incorporation of the catalyst particles [15][16][17].…”