Impedance measurements of a tin electrode in H2SO4 solutions

CNLS fits and Kramers–Kronig validation of resonant EIS data

“…In the passive range of potentials we recorded immittance spectra with all the features of resonant data and similar to those reported by other authors for electrodes close to instabilities [1][2][3][4][5][6]. Although at the time of publication [16] we were unable to fit suitable models to our data, it has become possible now, owing to the availability of the LEVM CNLS program [37].…”

“…The reason for showing data in all these, apparently superfluous, coordinates is that each set shows important features of these data and, in particular, Fig. 1(a), even if less informative than others, helps to compare these with similar data reported recently [1][2][3][4][5] and presented mostly in complex impedance coordinates. Fig.…”

“…Frequently, unusual electrochemical immittance spectroscopy (EIS) data are reported featuring a remarkably sharp peak of impedance magnitude (absolute value, modulus) at a particular frequency and by scattered data points close to this frequency in complex impedance coordinates (ÀIm(Z) vs. Re(Z)) [1][2][3][4][5][6]. This can be considered as analogous (in fact, the converse) to the resonance and the frequency of the impedance peak as an analogue of the resonant frequency characterizing the intrinsic frequency of the electrode and likely to produce sustained oscillations under suitable conditions.…”

Kramers-Kronig Transforms as Validation of Electrochemical Immittance Data Near Discontinuity

“…Recently there have been reported [32][33][34][35][36][37][38] and also recorded in our laboratory some unusual EIS of electrodes showing positive real impedances at zero and infinite frequency limits ͑polarization resistance R p , and ohmic resistance R s respectively͒ and positive or negative impedance components at intermediate frequencies.…”

Estudo eletroquímico das interfases estanho/perclorato e estanho/perclorato, ácido cítrico

“…27). Por outro lado, é reconhecido, na literatura [70,74,75,81], que durante a oxidação do metal ocorre uma dissolução intensa do estanho. Todas estas evidências levam a supor que o modelo de K. Ogura [124]…”