S. N. Eliseevaa, V. V. Maleva,b, and V. V. Kondrat’eva,z
aSt. Petersburg State University, Universitetskii pr. 26, St. Petersburg, Petrodvorets, 198504 Russia
bInstitute of Cytology, Russian Academy of Sciences, Tikhoretskii pr. 4, St. Petersburg, 194064 Russia
Received August 11, 2008
Abstract—The electrochemical behavior of composite Pd–PEDOT films is studied. These films are obtained
by chemical deposition of Pd particles in the polymeric matrix of PEDOT (poly-3,4-ethylenedioxythiophene).
Characteristics of the films are determined by means of cyclic voltammetry, faradaic impedance, microgravim-
etry, and energy-dispersive x-ray fluorescence analysis. Impedance spectra of composite Pd–PEDOT films,
compared to the original PEDOT film, reveal a new response at potentials of –0.3 and –0.4 V in the form of a
distinct semicircle, which results from processes in the electrochemical sorption–desorption of hydrogen.
Weight gain during the chemical deposition of palladium in the polymer structure is estimated by mircro-
gravimetry. It is shown that the mass of palladium loaded in the film depends on the time of synthesis and the
initial concentration of palladium ions in solution. The size of the actual surface and the average radius of dis-
persed palladium particles in the film are also estimated.
Key words: composite materials, poly-3,4-ethylenedioxythiophene, palladium particles, conducting polymers,
cyclic voltammetry, quartz microbalance, faradiac impedance spectroscopy
DOI: 10.1134/S1023193509090109
Pleiades Publishing home page | journal home page | top
If you have any problems with this server, contact webmaster.