Sonochemically prepared platinum-ruthenium bimetallic nanoparticles.
Colloidal bimetallic nanoparticles of Pt-Ru have been synthesized by sonochemical reduction of Pt(II) and Ru(III) in aqueous solutions. Transmission electron microscope (TEM) images indicate that sequential reduction of the Pt(II) followed by the Ru(III) produces particles with a core shell (Pt@Ru) morphology. In the presence of sodium dodecyl sulfate, SDS, as a stabilizer, the particles have diameters between 5 and 10 nm. When polyvinyl-2-pyrrolidone, PVP, is used as the stabilizer, the rate of reduction is much faster, giving ultrasmall bimetallic particles of approximately 5 nm diameter.
Vinodgopal
K
K
Particulate Fluid Processing Center, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia. kvinod@iun.edu
He
Yuanhua
Y
Ashokkumar
Muthupandian
M
Grieser
Franz
F