We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Impedance of Electrochemically Modified Graphite.
- Authors
Magdić, Katja; Kvastek, Krešimir; Horvat-Radošević, Višnja
- Abstract
Electrochemical impedance spectroscopy, EIS, has been applied for characterization of electrochemically modified graphite electrodes in the sulphuric acid solution. Graphite modifications were performed by potential cyclization between potentials of graphite oxide formation/reduction, different number of cycles, and prolonged reduction steps after cyclization. Impedance spectra measured at two potential points within double-layer region of graphite have been successfully modeled using the concept of porous electrodes involving two different electrolyte diffusion paths, indicating existence of two classes of pores. The evaluated impedance parameter values show continuous changes with stages of graphite modification, indicating continuous structural changes of pores by number of potential cycles applied. Differences of impedance parameter values at two potential values indicate the potential induced changes of solution properties within the pores of modified graphite.
- Subjects
GRAPHITE oxide; IMPEDANCE spectroscopy; POROUS electrodes; SULFURIC acid; RING formation (Chemistry); CHEMICAL reduction; ELECTROCHEMISTRY
- Publication
Acta Chimica Slovenica, 2014, Vol 61, Issue 2, p366
- ISSN
1318-0207
- Publication type
Article