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Local electrochemical impedance spectroscopy: Considerations about the cell geometry

Frateur, Isabelle and Mei-Wen Huang, Vicky and Orazem, Mark E. and Pébère, Nadine and Tribollet, Bernard and Vivier, Vincent Local electrochemical impedance spectroscopy: Considerations about the cell geometry. (2008) Electrochimica Acta , vol. 53 (n° 25). pp. 7386-7395. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2008.01.012

Abstract

Local electrochemical impedance spectroscopy provides a powerful tool for the investigation of surface heterogeneities on electrode surfaces. However, measurements are greatly influenced by geometry-induced frequency dispersion. In order to account for this frequency dispersion, both simulations and experiments were performed to explore the influence of a recessed electrode on the local and global impedance response. The calculations presented here demonstrated that the depth of the recessed electrode required to achieve a uniform primary current distribution was twice the electrode radius. The calculations provide guidelines for design of LEIS measurements, and were in good agreement with results obtained for a stainless steel disk electrode in a Na2SO4 electrolyte.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Electrochimica Acta website : http://www.sciencedirect.com/science/journal/00134686
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > University of Florida (USA)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Celine Cabaup
Deposited On:14 Apr 2009 14:10

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