| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6610963 | Electrochimica Acta | 2015 | 8 Pages |
Abstract
Cu-Pt nanopowders were prepared by sonoelectrochemistry followed by a displacement reaction. The first method provides pure copper particles. In the second method the surface copper atoms are replaced by platinum atoms. The influence of dissolved oxygen during the conversion reaction was also studied. Nanoparticles (NPs) were observed by transmission electron microscopy (TEM) and their size distribution was determined by centrifugal liquid sedimentation (CLS). The mean diameter of isolated particles was found to be around 8Â nm. Their composition was studied by energy dispersive X-ray spectroscopy (EDXS) and X-Ray photoelectron spectrometry (XPS). These analyses and X-ray diffraction (XRD) patterns showed that the particle shell is a solid solution of Cu and Pt. The shell composition is heterogeneous with a richer Pt percentage on its surface.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Samuel Levi, Valérie Mancier, Céline Rousse, Omar Lozano Garcia, Jorge Mejia, Maribel Guzman, Stéphane Lucas, Patrick Fricoteaux,