Deviation from the polarization resistance due to non-linearity .1. theoretical formulation

被引：32

作者：

Diard, JP ^{[1
]}

LeGorrec, B ^{[1
]}

Montella, C ^{[1
]}

机构：

[1] ECOLE NATL SUPER ELECTROCHIM & ELECTROMET,LAB ELECTROCHIM & PHYSICOCHIM MAT & INTERFACES,F-38402 ST MARTIN DHER,FRANCE

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1997年 / 432卷 / 1-2期

关键词：

non-linearity; electrochemical impedance; polarization resistance;

D O I：

10.1016/S0022-0728(97)00213-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The effects of electrochemical system non-linearity on low frequency impedance measurements are investigated and the influence of the electrolyte resistance on such measurements is considered under non-linear conditions. Theoretical expressions are derived that relate the polarization resistance measurement error, due to non-linearity, to the successive derivatives of the current vs potential characteristic when using a frequency response analyzer and a sinusoidal modulation of the potential or the current as the input signal. As an example, the exponential Tafel law is investigated theoretically and a semiconductor diode, which can be considered as a model system for exponential non-linearity, is studied experimentally to test the theory. Theoretical and experimental results invalidate a previous derivation in the literature. (C) 1997 Elsevier Science S.A.

引用

页码：27 / 39

页数：13

共 24 条

[11] Non-linear impedance for a two-step electrode reaction with an intermediate adsorbed species [J].