A new approach to the problem of “good” and “bad” impedance data in electrochemical impedance spectroscopy

Popkirov, G.; Schindler, R. N.

doi:10.1016/0013-4686(94)85083-6

Cited by 46 publications

(28 citation statements)

References 19 publications

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“…where nanoporous layer formation is observed on a typical LSV). electrolytes [15,32]. Channels within the near-surface layer were again found to have been formed and an example can be seen at G in Fig.…”

Section: Experiments At Constant Potential In 2 -5 Mol Dm -3 Kohmentioning

confidence: 83%

Anodic Formation and Characterization of Nanoporous InP in Aqueous KOH Electrolytes

O’Dwyer

Buckley

Sutton

et al. 2006

J. Electrochem. Soc.

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The anodic behavior of highly doped ͑Ͼ10 18 cm −3 ͒ n-InP in aqueous KOH was investigated. Electrodes anodized in the absence of light in 2-5 mol dm −3 KOH at a constant potential of 0.5-0.75 V ͑SCE͒, or subjected to linear potential sweeps to potentials in this range, were shown to exhibit the formation of a nanoporous subsurface region. Both linear sweep voltammograms and current-time curves at constant potential showed a characteristic anodic peak, corresponding to formation of the nanoporous region. No porous region was formed during anodization in 1 mol dm −3 KOH. The nanoporous region was examined using transmission electron microscopy and found to have a thickness of some 1-3 m depending on the anodization conditions and to be located beneath a thin ͑typically ϳ40 nm͒, dense, near-surface layer. The pores varied in width from 25 to 75 nm and both the pore width and porous region thickness were found to decrease with increasing KOH concentration. The porosity was approximately 35%. The porous layer structure is shown to form by the localized penetration of surface pits into the InP, and the dense, near-surface layer is consistent with the effect of electron depletion at the surface of the semiconductor.

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Section: Experiments At Constant Potential In 2 -5 Mol Dm -3 Kohmentioning

confidence: 83%

Anodic Formation and Characterization of Nanoporous InP in Aqueous KOH Electrolytes

O’Dwyer

Buckley

Sutton

et al. 2006

J. Electrochem. Soc.

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“…This allowed for fast EIS measurements ($1 s to record a full impedance spectrum), simultaneously with CV performed at 10 mV s À1 . The EIS data were validated through both frequencyand time-domain tests [22,23,[48][49][50]. Experimentally obtained Nyquist (Z 0 -Z 00 ) spectra were CNLS analyzed using the ZSimpWinä software to determine EECs.…”

Section: Methodsmentioning

confidence: 99%

“…(D) An extension of the EEC of (C), where the resistance R DC provides the necessary DC current path for a faradaic system. current variations are considerably larger than their respective DC counterparts [48][49][50]. This in turn implies that the DC scan rate (v) of CV and the minimum frequency in the applied AC perturbation spectrum must be adjusted [22,23] to satisfy the conditions, jdE=dtj ¼ v ( jd e Eðf min Þ=dtj rms , and jd i=dtj ( jdĩðf min Þ=dtj rms .…”

Section: Frequency-constraints Of Differential Capacitance (And Othermentioning

confidence: 98%

“…The other necessary conditions for EIS are dictated primarily by the requirement of a steady-state system, and for this reason the term ''impedance'' in the context of potentiostatic EIS has been traditionally associated with strictly time-invariant systems [15,39,[45][46][47]. Popkirov and coworkers have discussed in detail the implications of this steady-state condition in the context of time resolved FT-EIS [17,[48][49][50]. As pointed out by these authors, FT-EIS can be applied to experimental systems that are maintained in ''short term'' steady state during the application of the AC perturbation voltage [17].…”

Section: Frequency-constraints Of Differential Capacitance (And Othermentioning

confidence: 99%

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Measurement of differential capacitance for faradaic systems under potentiodynamic conditions: Considerations of Fourier transform and phase-selective techniques

Pettit

Goonetilleke

Roy

2006

Journal of Electroanalytical Chemistry

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“…This method was also applied by Dygas et al [48]. An alternative approach for the validation of experimental EIS data is presented by Popkirov and Schindler [27,29,30]. In their work the comparison of the response amplitude spectrum with the perturbation spectrum is used as a diagnostic tool for measurements made by means of a sum of properly defined sine waves.…”

Section: Introductionmentioning

confidence: 96%

Advantages of Odd Random Phase Multisine Electrochemical Impedance Measurements

Ingelgem¹,

Tourwe²,

Blajiev³

et al. 2009

Electroanalysis

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Electrochemical impedance spectroscopy (EIS) is a powerful technique to study electrochemical processes and to perform screening tasks. Recently an integrated measuring and modeling methodology for EIS based on a multisine excitation signal was developed. A key issue in this methodology is the data analysis, allowing us to rapidly quantify the reliability of the measured data. In this paper, a comparison is made between classical single-sine and the proposed multisine measurements on the same system. The fitting of the impedance data obtained by single-or multisine excitation and using different weighting factors is also discussed. In addition to the advantages reported in earlier work, it is concluded that, of all investigated frequencies, the odd random phase multisine excitation yields the highest quality data in the shortest measurement time.

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A new approach to the problem of “good” and “bad” impedance data in electrochemical impedance spectroscopy

Cited by 46 publications

References 19 publications

Anodic Formation and Characterization of Nanoporous InP in Aqueous KOH Electrolytes

Anodic Formation and Characterization of Nanoporous InP in Aqueous KOH Electrolytes

Measurement of differential capacitance for faradaic systems under potentiodynamic conditions: Considerations of Fourier transform and phase-selective techniques

Advantages of Odd Random Phase Multisine Electrochemical Impedance Measurements

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