• DocumentCode
    3488002
  • Title

    Investigation of charging, transport and reaction processes in Ti/IrO2-Nb2O5 anodes prepared by a sol-gel derived method

  • Author

    Terezo, A.J. ; Moura, Valterley A. ; Costa, Mauro M. ; Pereira, Ernesto C.

  • Author_Institution
    Dept. de Fisica, Univ. Fed. do Mato Grosso, Cuiaba, Brazil
  • fYear
    2005
  • fDate
    11-14 Sept. 2005
  • Firstpage
    324
  • Lastpage
    326
  • Abstract
    In the present work we investigate the charging, transport and reaction processes in Ti/IrO2-Nb2O5 using electrochemical impedance spectroscopy (EIS). The electrochemical impedance response of the electrodes was modeled using the theory of porous electrodes. The spectra for the electrodes in a wide range of composition have shown the typical behavior of a porous structure, exhibiting a straight line with slope of 45° at high frequency and a CPE in the low frequency domain, depending on the applied dc-potential. The spectra were adjusted to the model and the impedance parameters were extracted and analyzed as function of the electrode composition and applied dc voltage.
  • Keywords
    anodes; electrochemical electrodes; electrochemical impedance spectroscopy; iridium compounds; niobium compounds; porous materials; sol-gel processing; titanium; Ti-IrO2-Nb2O5; Ti-IrO2-Nb2O5 anodes; applied dc voltage; applied dc-potential; charging process; electrochemical impedance spectroscopy; electrode composition; porous electrodes; porous structure; reaction process; sol-gel method; transport process; Anodes; Coatings; Conductivity; Electrodes; Impedance; Rough surfaces; Solid modeling; Substrates; Surface morphology; Surface roughness;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electrets, 2005. ISE-12. 2005 12th International Symposium on
  • Print_ISBN
    0-7803-9116-0
  • Type

    conf

  • DOI
    10.1109/ISE.2005.1612388
  • Filename
    1612388
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3488002