Abstract
The kinetics, mass transport, and double layer features of the reversible ferro-ferricyanide redox couple were studied through intermodulated differential immittance spectroscopy (IDIS). The system is fully characterized by the quantification of the electron-transfer parameters (α, and i0), the diffusion coefficients of the redox couple (Dred and Dox), together with the double layer capacitance and its variation (Cdl and Δdl) at the open circuit potential, without the need of assuming a particular dependence of these parameters on the potential. The result was achieved by implementing the mathematical framework developed previously in a fitting procedure, which takes into account simultaneously the impedance spectrum and several differential immittance spectra of the system.
Published Version
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