Monitoring of the electrochemical degradation of PEDOT films on gold using the bending beam method

The Electrochemical Degradation of Poly(3,4-ethylenedioxythiophene) Films Electrodeposited from Aqueous Solutions

“…According to published results [22], irreversible oxidation of the PEDOT film starts at or above 0.8 V vs. SCE. This means that at potentials more positive than 0.8 V vs. SCE irreversible degradation of the polymer layer occurs as it can be seen in Fig.…”

“…Overoxidation of PEDOT films prepared electrochemically under "normal" conditions has been investigated in [22][23][24][25]. A series of cyclic voltammetric curves of Au|PEDOT|0.1 M sulfuric acid (aq.)…”

“…[21][22][23][24][25] that at sufficiently positive electrode potentials, degradation of the polymer occurs. That is, when the positive potential limit of the cyclic voltammogram (CV) is extended to the region in which the "overoxidation" of the polymer film takes place, an oxidation peak (without a corresponding reduction peak) appears in the CV.…”

“…[22,23,24] it has been shown that PEDOT films in modified electrodes undergo structural changes during the overoxidation (degradation) process. The most probable stages involved in the overoxidation/degradation process are: 1) Overoxidation results in stress 3 generation in the PEDOT film [26].…”

Structural changes during the overoxidation of electrochemically deposited poly(3,4-ethylenedioxythiophene) films

“…[20][21][22] that at sufficiently positive electrode potentials, degradation ("overoxidation") of the polymer takes place. That is, when the positive potential limit of the cyclic voltammogram (CV) is extended to the region in which the overoxidation of the polymer film takes place, an oxidation peak (without a corresponding reduction peak) appears in the CV.…”