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Article Dans Une Revue Electrochimica Acta Année : 2008

Local electrochemical impedance spectroscopy: Considerations about the cell geometry

Résumé

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.
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hal-03590901 , version 1 (28-02-2022)

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Isabelle Frateur, Vicky Mei-Wen Huang, Mark E. Orazem, Nadine Pébère, Bernard Tribollet, et al.. Local electrochemical impedance spectroscopy: Considerations about the cell geometry. Electrochimica Acta, 2008, 53 (25), pp.7386-7395. ⟨10.1016/j.electacta.2008.01.012⟩. ⟨hal-03590901⟩
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