PdAg _2 nanoparticles in aqueous solution: Preparation, characterization, and catalytic properties

摘要

The reduction of a heterobimetallic complex, Pd(OOCMe)4Ag _2(HOOCMe)4, with hydrogen or sodium borohydride in an aqueous solution produces PdAg _2 nanoparticles of an alloy or intermetallic type. It is shown that the catalytic activity of the particles in the reduction of methyl viologen with hydrogen is lower than that of palladium nanoparticles of the same size. Therewith, "borohydride" nanoparticles mani- fest a higher catalytic activity than do "hydrogen" ones. Unlike silver nanoparticles, PdAg _2 nanoparticles do not catalyze the decomposition of hydrazine.