PREPARATION AND CHARACTERIZATION OF BIMETALLIC PD-CU COLLOIDS BY THERMAL-DECOMPOSITION OF THEIR ACETATE COMPOUNDS IN ORGANIC-SOLVENTS

Bimetallic Pd-Cu/Cu2O colloids are prepared by the thermal decomposition of their acetates dissolved in methyl isobutyl ketone and bromobenzene. In methyl isobutyl ketone, the average diameter of Pd-Cu2O colloids decreases from about 130 to 50 nm with an increase of molar fraction of palladium acetate, while in bromobenzene the size of Pd-Cu colloids increases from about 8 to 15 nm. The composition of Pd-Cu or Pd-Cu2O colloids is almost the same as that of the feed ratio of their acetates. The dispersion stability of these colloids is further addressed by measuring their ζ potentials. © 1990, American Chemical Society. All rights reserved.