Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 395721

The effect of the PANI-free volume on impedance response


Žic, Mark
The effect of the PANI-free volume on impedance response // Journal of electroanalytical chemistry (1992), 610 (2007), 1; 57-66 doi:10.1016/j.jelechem.2007.07.001 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 395721 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
The effect of the PANI-free volume on impedance response

Autori
Žic, Mark

Izvornik
Journal of electroanalytical chemistry (1992) (1572-6657) 610 (2007), 1; 57-66

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
PANI ; EIS ; capacitive current plateau ; PANI-free volume

Sažetak
The influence of polyaniline (PANI) layer thickness and applied potential on impedance characteristics was investigated. The impedance response of PANI layers, presented in the low frequency region of Nyquist spectra, indicates a decrease of real and imaginary impedance values as the thickness of the PANI layer increases. Presentations of EIS data in Bode diagrams show two potentially dependent separate processes, detected in the low and in the high frequency regions. The model used to analyze EIS data in terms of an electrical equivalent circuit resulted in PANI pseudocapacitance and PANI resistance values, which were used to calculate time- constants for each of the processes. The total PANI pseudocapacitance, calculated from PANI EIS parameters, was compared to the capacitive current plateau. The changes in EIS parameters were used to interpret processes taking place inside PANI and at the PANIjelectrolyte interface. It was found that the PANI-free volume has a significant influence on the counter-ion flux inside PANI. The PANI-free volume was increased when more positive potential was applied. The effect of the PANI-free volume on capacitance and resistance characteristic, responsible for an impedance response in the low frequency region, was established. The impedance response of the PANI layer was changed upon prolonged ageing of the PANI layer in the supporting electrolyte. The ageing resulted in a decrease of the PANI free volume, which consequently resulted in an increase of ionic charge-transfer resistance responsible for the counter-ion flux.  2007 Elsevier B.V. All rights reserved.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo



POVEZANOST RADA


Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Profili:

Avatar Url Mark Žic (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com

Citiraj ovu publikaciju:

Žic, Mark
The effect of the PANI-free volume on impedance response // Journal of electroanalytical chemistry (1992), 610 (2007), 1; 57-66 doi:10.1016/j.jelechem.2007.07.001 (međunarodna recenzija, članak, znanstveni)
Žic, M. (2007) The effect of the PANI-free volume on impedance response. Journal of electroanalytical chemistry (1992), 610 (1), 57-66 doi:10.1016/j.jelechem.2007.07.001.
@article{article, author = {\v{Z}ic, Mark}, year = {2007}, pages = {57-66}, DOI = {10.1016/j.jelechem.2007.07.001}, keywords = {PANI, EIS, capacitive current plateau, PANI-free volume}, journal = {Journal of electroanalytical chemistry (1992)}, doi = {10.1016/j.jelechem.2007.07.001}, volume = {610}, number = {1}, issn = {1572-6657}, title = {The effect of the PANI-free volume on impedance response}, keyword = {PANI, EIS, capacitive current plateau, PANI-free volume} }
@article{article, author = {\v{Z}ic, Mark}, year = {2007}, pages = {57-66}, DOI = {10.1016/j.jelechem.2007.07.001}, keywords = {PANI, EIS, capacitive current plateau, PANI-free volume}, journal = {Journal of electroanalytical chemistry (1992)}, doi = {10.1016/j.jelechem.2007.07.001}, volume = {610}, number = {1}, issn = {1572-6657}, title = {The effect of the PANI-free volume on impedance response}, keyword = {PANI, EIS, capacitive current plateau, PANI-free volume} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





    Contrast
    Increase Font
    Decrease Font
    Dyslexic Font