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

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 d...

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Bibliographic Details
Published in:Electrochimica acta 2002-05, Vol.47 (13), p.2109-2116
Main Authors: Barcia, O.E., D'Elia, E., Frateur, I., Mattos, O.R., Pébère, N., Tribollet, B.
Format: Article
Language:English
Subjects:
Cast iron
Chemical Sciences
Chemistry
Copper
EIS
Electrochemistry
Exact sciences and technology
General and physical chemistry
Material chemistry
Miscellaneous
Pore parameters
Porous electrode
Regression procedure
Study of interfaces
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Summary: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 r 3/2 n 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.
ISSN:0013-4686
1873-3859
DOI:10.1016/S0013-4686(02)00081-6