期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 13, 期 10, 页码 5057-5064出版社
SPRINGER
DOI: 10.1007/s11051-011-0486-9
关键词
Pt; Pt-Cu; Pt-Ag nanoparticles; Bimetallic nanoparticles; Core-shell structure; Bimetallic nanocrystals; Synthesis method
资金
- [AMAP 32116]
Well-dispersed, uniform monometallic Pt and bimetallic Pt-Cu, and Pt-Ag nanoparticles protected with PVP have been synthesized by a modified-protocol alkaline polyol method. The nanoparticles were characterized by various methods (TEM, XPS, and XRD) to elucidate the relationship between morphology and preparation variables. The average of monodispersed nanoparticles ranged between 4.1 and 4.9 nm. Core-shell structure was obtained in the case of bimetallic nanoparticles. The core of bimetallic nanoparticles was found to be rich in platinum, whereas the shell contained mostly copper or silver. The final structure of bimetallic nanoparticles was found to be determined by the morphology particles resulted in the first reduction step. Explanations are advanced on the light of experimental results.
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