Application of the impedance model of de Levie for the characterization of porous electrodes

O.E Barcia , E. d'Elia , Isabelle Frateur (1) , O.R. Mattos , Nadine Pébère (2) , Bernard Tribollet (3)

1 LPCS - Laboratoire de Physico-Chimie des Surfaces
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 LISE - Laboratoire Interfaces et Systèmes Electrochimiques

From the de Levie's theory for a porous electrode, the impedance can be expressed in function of the cylindrical pore characteristics: the pore length, the pore radius and the number of pores. If the pores have a finite length, these parameters can be regressed from the experimental impedance diagrams. In the case of a semi-infinite pore length, only the product r3/2n can be obtained. In this paper, two practical examples of porous electrodes were presented: the corrosion of cast iron in drinking water and the electrodissolution of copper in 1 M hydrochloric acid solution. In each case, the pore parameters were assessed.

Mots clés: Cast iron; Copper; Regression procedure; EIS; Porous electrode; Pore parameters

Domaines: Matériaux

O.E Barcia, E. d'Elia, Isabelle Frateur, O.R. Mattos, Nadine Pébère, et al.. Application of the impedance model of de Levie for the characterization of porous electrodes. Electrochimica Acta, 2002, 47 (13-14), pp.2109-2116. ⟨10.1016/S0013-4686(02)00081-6⟩. ⟨hal-00476969⟩