Ac-Electrogravimetry Study of Electroactive Thin Films. II. Application to Polypyrrole - Sorbonne Université Access content directly
Journal Articles Journal of Physical Chemistry B Year : 2002

Ac-Electrogravimetry Study of Electroactive Thin Films. II. Application to Polypyrrole

Abstract

Polypyrrole films were investigated by using ac-electrogravimetry, that is, simultaneous impedance and electrogravimetry spectroscopies at various potentials between the reduced and oxidized forms in NaCl solutions. Information about the movement of anions, cations, and solvent during the switching of polypyrrole between oxidation states was obtained. Anions were inserted in the film, whereas cations and solvent were expelled during oxidation. Sodium ions were solvated, but the hydration number was lower at anodic potentials. The insertion/expulsion isotherms and the transfer time constants were obtained for the three species.

Dates and versions

hal-04236907 , version 1 (11-10-2023)

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Claude Gabrielli, Jose Garcia-Jareño, Michel Keddam, Hubert Perrot, Francisco Vicente. Ac-Electrogravimetry Study of Electroactive Thin Films. II. Application to Polypyrrole. Journal of Physical Chemistry B, 2002, 106 (12), pp.3192-3201. ⟨10.1021/jp013925p⟩. ⟨hal-04236907⟩
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