SPECTROELECTROCHEMICAL STUDIES OF CARBON-BASED SCREEN-PRINTED ELECTRODES MODIFIED WITH POROUS GELS OF ZIRCONIUM, CLAYS AND CALIXARENES
STUDIA UNIVERSITATIS BABES-BOLYAI CHEMIA(2012)
摘要
Electrochemical impedance spectroscopy (EIS) was applied in order to analyze the properties of carbon based screen-printed electrodes modified with clay, Zr porous gel. Parametric equations for Nyquist diagrams applicable in extreme domain of frequencies were used in the case of clay or Zr porous gel modifiers. The equations lead to an analysis of the curves around the frequency of 0.1 Hz. The terms expressing diffusion and charge transfer respectively, were calculated for the proposed electrodes. For comparison Nova 1.6 AUTOLAB soft was used to determining the electrochemical terms involved in Warburg classical circuits.
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关键词
screen-printed electrodes,electrochemical impedance spectroscopy,clay,zirconium oxide nanoporous gel
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