Oxidation-reduction of polypyrrole films. Kinetics, structural model and applications

Electrochemical behavior of Ni particles modified polypyrrole films studied by EQCN technique

“…1 shows the growth curves under potentiostatic condition for both PPy (dotted line) and PPy-Ni (solid line). One can see from the current curves for the PPy a nucleation process in agreement with the literature data for polymer growth [30]. The nucleation step for PPy-Ni case is very fast as can be observed at Fig.…”

Poly(3-methylthiophene) oxidation under chemical control. Rate coefficients change with prepolarization potentials of reduction

“…Most of the kinetics and mechanistic aspects of these chemical reactions involving polymer gels, ions and solvent remain untreated. A basic question is, if during some time along the complex chronoamperometric response promoted by potentiostatic oxidation of films of conducting polymers after prepolarization at high cathodic potentials, the involved chemical reaction can control the process, as stated for polypyrrole [8] some years ago.…”

Biomimetic Conducting Polymers: Synthesis, Materials, Properties, Functions, and Devices

“…The non-stoichiometric nature was visualized from thin electrochromic films. 24,25 After reduction at a high cathodic potentials the yellow reduced film produces, after step to an anodic potential, nuclei of black oxidized (CP) n+ A − n polymer that expand and coalesce (Fig. 4) for rising oxidation times.…”

“…20,[62][63][64][65][66][67][68] The oxidized film of a CP exchanging anions is a swollen dense gel including anions and solvent. Considering a cubic element inside the material (Fig.…”