Discontinuous immittance due to a saddle node bifurcation

Autor: B. Le Gorrec, Jean-Paul Diard, Claude Montella, Fabienne Berthier
Rok vydání: 1998
Předmět:
Zdroj: Journal of Electroanalytical Chemistry. 458:231-240
ISSN: 1572-6657
DOI: 10.1016/s0022-0728(98)00359-3
Popis: The Frumkin isotherm for the electrosorption reaction is S-shaped for the interaction parameter values lower than a critical level, leading to a hysteresis loop during steady-state studies. It is shown that isotherm branch switching phenomena can occur during the study of the electrosorption reaction by electrochemical impedance spectroscopy. Two- and three-part discontinuous impedance diagrams can be observed when the sinusoidal potential modulation spans the discontinuity potentials, depending on the frequency sweep direction.
Databáze: OpenAIRE