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Analysis of Impedance Spectra of Vacuum-Annealed Undoped Polycrystalline Diamond Electrodes

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Abstract

Impedance spectra for a new electrode material, undoped polycrystalline diamond films vacuum-annealed at 1775 to 1915 K, taken in indifferent electrolytes are analyzed. Regular changing of parameters of the equivalent circuit (constant-phase element, ohmic and faradaic resistances) with increasing anneal temperature is demonstrated. It is concluded that both the amount of a nondiamond conducting phase in the electrode bulk increased and its properties (first and foremost, the conductivity) changed with increasing anneal temperature.

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Authors and Affiliations

  1. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia

    V. V. Elkin & M. D. Krotova

Authors
  1. V. V. Elkin
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  2. M. D. Krotova
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  3. Yu. V. Pleskov
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Elkin, V.V., Krotova, M.D. & Pleskov, Y.V. Analysis of Impedance Spectra of Vacuum-Annealed Undoped Polycrystalline Diamond Electrodes. Russian Journal of Electrochemistry 39, 941–947 (2003). https://doi.org/10.1023/A:1025719920169

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  • DOI: https://doi.org/10.1023/A:1025719920169

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