Parametrization of impedance spectra of GC/H2SO4 electrode: trials and errors

被引:0
|
作者
Horvat-Radosevic, V. [1 ]
Magdic, K. [1 ]
Kvastek, K. [1 ]
机构
[1] Rudjer Boskovic Inst, Zagreb 10000, Croatia
来源
BULGARIAN CHEMICAL COMMUNICATIONS | 2012年 / 44卷 / 04期
关键词
GC electrodes; Electrochemical impedance spectroscopy; Electrical equivalent circuits; Parametrization; DOUBLE-LAYER CAPACITANCE; GLASSY-CARBON; ELECTROCHEMICAL IMPEDANCE; SPECTROSCOPY; POLYANILINE; PRINCIPLES; ADSORPTION; MODEL;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Impedance spectra of two differently prepared (polished and anodically oxidized) GC electrodes measured at +0.30 V vs. SCE in 0.5 mol dm(-3) H2SO4 electrolyte have been analysed on the basis of presumed electrical equivalent circuit(s) and complex non-linear least square fitting procedure. Statistical analysis of model residuals and reliability of the estimated values of parameters were used as indicators for correct or incorrect modeling. In such a way, the polished GC electrode has been modeled using not-ideal capacitive element describing relatively flat surface, whereas anodically oxidized GC electrode has been modeled using not-ideal capacitive element loaded by transmision line element representing a porous surface structure.
引用
收藏
页码:356 / 363
页数:8
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