INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Catalytic EC reaction at a thin film modified electrode
Autor/es:
LEANDRO GERBINO; ANA BARUZZI; RODRIGO A. IGLESIAS
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 88 p. 66 - 73
ISSN:
0013-4686
Resumen:
Numerical simulations of cyclic voltammograms corresponding to a catalytic EC reaction taking place
at a thin film modified electrode are performed by way of finite difference method. Besides considering
the chemical kinetic occurring inside the thin film, the model takes into account the different diffusion
coefficients for each species at each of the involved phases, i.e. the thin film layer and bulk solution. The
theoretical formulation is given in terms of dimensionless model parameters but a brief discussion of
each of these parameters and their relationship to experimental variables is presented.
Special emphasis is given to the use of working curve characteristics to quantify diffusion coefficient,
homogeneous kinetic constant and thickness of the thin layer in a real system.
Validation of the model is made by comparison of experimental results corresponding to the electron
charge transfer of Ru(NH3)6
3+/Ru(NH3)6
2+ hemi-couple at a thin film of a cross-linked chitosan film
containing an immobilized redox dye.