X-ray Absorption Study of PdCu Bimetallic Alloy Nanoparticles Containing an Average of 64 Atom
The synthesis and characterization of PdCu bimetallic nanoparticles and Pd and Cu monometallic nanoparticles, consisting of an average of {approx}64 atoms, is described. The bimetallic nanoparticles were prepared by cocomplexation of Pd{sup 2+} and Cu{sup 2+} to interior functional groups of a sixth-generation poly(amidoamine) dendrimer template, followed by chemical reduction to yield dendrimer-encapsulated nanoparticles (DENs). Extended X-ray absorption fine structure (EXAFS) spectroscopy indicates that the particles have an alloy structure. TEM studies indicate particle diameters of 1.2-1.3 nm. This is a rare example of a stable nanoparticle in this size range that consists of one reactive metal and one substantially more noble metal. Such materials are predicted by first-principles theory to have interesting catalytic properties.
- Research Organization:
- Brookhaven National Laboratory (BNL) National Synchrotron Light Source
- Sponsoring Organization:
- DOE - OFFICE OF SCIENCE
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1019730
- Report Number(s):
- BNL--95576-2011-JA
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 20 Vol. 21; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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