Electrochemical impedance spectroscopic study of electropolymerized poly(paraphenylene) film on platinum electrode surface

✍ Scribed by Zhiqiang Gao; Carita Kvarnström; Ari Ivaska

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 711 KB
• Volume: 39
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(94)e0059-9

✦ Synopsis

Ah&act-The electrochemical impedance spectra of poly(para-phenylene) (PPP) iihns prepared potentiostatically in 0.1 M tetra(n-butyl ammonium) tetrafluoroborate (T'BABFJ acentonitrile solution have been examined. Charge transfer resistance was very low at the oxidixed state, which is in agreement with the conductive behavior when the polymer is oxidii. The corresponding exchange current density was very high. Values of the capacitance associated with the polymer varied as a function of the film thickness and the electrode potential. The experimental impedance data have beeu fitted to an equivalent electrical circuit. It was therefore possible to follow the changes of the parameters of the mass transport, charge transfer and double layer with the redox states of the polymer. The etfect of experimental conditions on the impedance response of the polymer film was also studied.