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- W2185962857 abstract "Bimetallic PdPt dendrimer-encapsulated nanoparticles (DENs) hav- ing sizes of about 2 nm were synthesized by a homogeneous route that involved (1) formation of a Pd core, (2) deposition of a Cu shell onto the Pd core in the presence ofH2gas, and (3)galvanic exchange of Ptforthe Cu shell. Under these conditions,a Pd@Pt core@shell DEN is anticipated, but detailed characterization by in-situ extended X-ray absorption fine structure (EXAFS) spectroscopy and other analytical methods indicate that the metals invert to yield a Pt-rich core with primarily Pd in the shell. The experimental findings correlate well with densityfunctional theoretical(DFT)calculations. Theorysuggests that the increased disorderassociated with <∼2nmdiameter nanoparticles, along with the relatively large number of edge and corner sites, drives the structural rearrangement. This type of rearrangement is not observed on larger nanoparticles or in bulk metals." @default.
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- W2185962857 date "2013-01-01" @default.
- W2185962857 modified "2023-09-22" @default.
- W2185962857 title "An Experimental and Theoretical Investigation of the Inversion of Pd@Pt Core@Shell Dendrimer-Encapsulated" @default.
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