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11.
Composite Films of Metal Hexacyanoferrate and Poly 1,8-Diaminonaphthaline
Derivatives: Electrosynthesis and Properties
A.A. Hathoot*, D. Sherif and M. Abdel-Azzem
Laboratory of Electrochemistry, Chemistry Department, Faculty of
Science, El-Menoufia University, Shebin El-Kom, Egypt, E-mail:
ablahathoot@yahoo.com,
Fax.:+2048235689
Abstract:
The
details of a potentiodynamic preparation method for a composite
nickel (II) and copper (II) hexacyanoferrate (MeHcF) and poly
8-(3-acetylimino-6-methyl-2,4-dioxopyran)-1-aminonaphthaline (PAMDAN)
on a platinum electrode, (Pt/PAMDAN/MeHcF) are reported. The
cyclic voltammograms recorded the direct deposition and growth
of inner layer (PAMDAN) and the outer layer (MeHcF) from their
solutions. The two composite electrodes show an improvemtnt in
the redox response. The voltammetric characteristics of the
composite modified electrodes were also investigated in presence
of different alkali metal cations (Li+, Na+, K+ and NH4+). The
heterogeneous electron transfer processes involving the
composite and their stability are examined in air and
in aqueous solutions. Bilayer composite electrodes exhibit
higher ionic conductivity, higher stability in comparison with
pure inorganic (MeHcF) films. The inner electroactive polymer
chains in the film cause enhancement in the electric
conductivity of the composite electrodes.
Keywords: Electropolymerization, electrodeposition, hybrid films,
composite electrode, prussian blue analogue, modified
electrode, cyclic voltammetry.
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