STRUCTURE OF POLYNUCLEAR PALLADIUM(II) HYDROXOCOMPLEXES AND THE MECHANISM OF THEIR ADSORPTION BY CARBON MATERIALS

Adsorption of polynuclear palladium(II) hydroxocomplexes (PHC) by carb on materials (CM) was studied. It was found that PHC are adsorbed from aqueous solutions without a change in their chemical composition and are composed of clusters (<10 Angstrom) with metal-metal distances typ ical of the PdO chain structure. Three-dimensional ordered particles w ith the PdO structure were formed upon adsorption of PHC on carbon mat erials al room temperature or after the PHC suspension was dried in ai r at 400 degrees C (the size of the particles was 15 and 25 Angstrom, respectively). Calculation of tile electron-microscopic images of the adsorbed PHC with atomic resolution based on crystal structure modelin g showed that PdO particles containing similar to 100 palladium atoms is tile final product after drying of tile adsorbed PHC.