ИСТИНА

ИСПАНИЯ- Сенвилья 2008 -59 The comparative study of adsorption of camphor and sodium kryptate was carried out by cyclic voltammetry and impedance spectroscopy at carbon electrodes containing nanopaper, column and filament structures. Adsorption characteristics of these adsorbates were studied earlier on smooth electrodes. The differential capacity of nanopaper and columnar structure electrodes in aqueous solution with 10-4 M camphor and sodium kryptate was shown to increase on 3–5 times within all region of their adsorption. The increase of concentration of adsorbates results in greater growth of capacity of nanopaper and column structures. This experimental fact was explained by considerable growth of surface area accessible for electrolyte. Increase in differential capacity was caused by partial disruption of bundles of nanopaper electrodes. These bundles were formed by conglutination of single walled nanotubes during synthesis owing to Van der Waals forces. Increase in capacity of columnar electrodes was explained by splitting of carbon flakes forming these structures. In author’s opinion these experimental data are the first evidence of Rebinder’s effect in electrochemistry. Rebinder’s effect means plasticize action of solutions of organic surface-active substance on solid materials. Thermodynamic action of Rebinder’s effect implies decrease of surface free energy of solid material during organic surface-active substance adsorption. As opposed to nanopaper and columnar electrodes the filament structure showed insignificant decrease (1.2–1.3 times) of differential capacity in solutions in the presence of camphor and sodium cryptate at investigated potentials and frequencies .