Impedance Analysis of Poly(vinylferrocene) Films: The Dependence of Diffusional Charge Transport and Exchange Current Density on Polymer Oxidation State

Thomas B. Hunter; Paul S. Tyler; William H Smyrl; Henry S. White

doi:10.1149/1.2100851

Impedance Analysis of Poly(vinylferrocene) Films: The Dependence of Diffusional Charge Transport and Exchange Current Density on Polymer Oxidation State

Thomas B. Hunter, Paul S. Tyler, William H Smyrl, Henry S. White

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

112 Scopus citations

Abstract

The impedance of poly(vinylferrocene) (PVF) films coated on Pt electrodes and immersed in acetonitrile solutions containing 0.1M tetra(n-butylammonium) perchlorate has been examined. Three distinct regions are observed in the complex impedance plots for these films: kinetic control at high frequencies, diffusional control at intermediate frequencies, and charge saturation at low frequencies. The effective diffusion coefficient for charge transport, D_CT, the redox capacitance, C_L, and the exchange current density, i₀, for the reaction [(PVF)ⁿ⁺-nClO^-₄ ] + ne^-⇌ PVF + nClO₄^-, have been measured as a function of the polymer oxidation state.

Original language	English (US)
Pages (from-to)	2198-2204
Number of pages	7
Journal	Journal of the Electrochemical Society
Volume	134
Issue number	9
DOIs	https://doi.org/10.1149/1.2100851
State	Published - Sep 1987

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abstract = "The impedance of poly(vinylferrocene) (PVF) films coated on Pt electrodes and immersed in acetonitrile solutions containing 0.1M tetra(n-butylammonium) perchlorate has been examined. Three distinct regions are observed in the complex impedance plots for these films: kinetic control at high frequencies, diffusional control at intermediate frequencies, and charge saturation at low frequencies. The effective diffusion coefficient for charge transport, DCT, the redox capacitance, CL, and the exchange current density, i0, for the reaction [(PVF)n+-nClO-4 ] + ne-⇌ PVF + nClO4-, have been measured as a function of the polymer oxidation state.",

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AU - White, Henry S.

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N2 - The impedance of poly(vinylferrocene) (PVF) films coated on Pt electrodes and immersed in acetonitrile solutions containing 0.1M tetra(n-butylammonium) perchlorate has been examined. Three distinct regions are observed in the complex impedance plots for these films: kinetic control at high frequencies, diffusional control at intermediate frequencies, and charge saturation at low frequencies. The effective diffusion coefficient for charge transport, DCT, the redox capacitance, CL, and the exchange current density, i0, for the reaction [(PVF)n+-nClO-4 ] + ne-⇌ PVF + nClO4-, have been measured as a function of the polymer oxidation state.

AB - The impedance of poly(vinylferrocene) (PVF) films coated on Pt electrodes and immersed in acetonitrile solutions containing 0.1M tetra(n-butylammonium) perchlorate has been examined. Three distinct regions are observed in the complex impedance plots for these films: kinetic control at high frequencies, diffusional control at intermediate frequencies, and charge saturation at low frequencies. The effective diffusion coefficient for charge transport, DCT, the redox capacitance, CL, and the exchange current density, i0, for the reaction [(PVF)n+-nClO-4 ] + ne-⇌ PVF + nClO4-, have been measured as a function of the polymer oxidation state.

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Impedance Analysis of Poly(vinylferrocene) Films: The Dependence of Diffusional Charge Transport and Exchange Current Density on Polymer Oxidation State

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