Anthraquinonedisulfonate Doped Polyaniline as an Acceptor‐Donor System for Electrocatalysis of Oxygen Reduction

Abstract

A stable polyaniline (PANI) film doped with anthraquinonedisulfonate (AQDS) on glassy carbon (GC) electrode is obtained in acidic solution. The electrochemical behavior of PANI/AQDS film coincides with the donor -acceptor (DA) intramolecular interaction, while the doped AQDS behaves as a two-electron two-proton transfer process during redox reaction. This GC/PANI/AQDS electrode shows high electrocatalytic activity and irreversible electrontransfer characteristic for O 2 two-electron reduction. Tafel behavior analysis suggests that the oxygen reduction kinetics are different at certain potential regions on this electrode. Possible mechanism of oxygen reduction on the GC/PANI/AQDS electrode points to a similar Schottky diode characteristic.

Electrocatalytic Reduction of Oxygen at Anthraquinonedisulfonate/Polypyrrole Composite Film Modified Electrodes and Its Application to the Electrochemical Oxidation of Azo Dye

“…It is reported [48] that the stability and electronic conductivity of PPy films doped with various anthraquinone sulfonates correlate well with the number of sulfonate groups attached and the best result attained at one sulfonate group per dopant molecule, for example, anthraquinone-2-sulfonate, due to its high degree of planarity. Moreover, to select conducting polymer with better stability than PPy, for instance, polyaniline (PANi) [49], as the modification material of electrode may be another good method.…”