BEHAVIOR AT THE POTENTIALS OF ALPHA-PHASE OF PALLADIUM PARTICLES INCORPORATED IN POLY(VINYLPYRIDINE) FILM

Sorption characteristics of electrolytic deposits of Pd on glassy carb on modified by a cross-linked poly(vinylpyridine) (PVP) film are inves tigated. Copper adatoms are used in order to estimate true surface are as of the resultant deposits and identify fractions of dissolved and a dsorbed hydrogen on Pd at the potentials of alpha-phase. Adsorption me asurements involving organic substances analogous to structural elemen ts of the polymeric matrix are employed for elucidating interrelations between the polymeric film and Pd particles. Poly(vinylpyridine) film is found to exert an essential influence on the formation of Pd parti cles permitting extremely finely divided deposits to be obtained. The behavior of these particles is believed to be affected by the size eff ect and an adsorption interaction between the particle and the polymer ic matrix.