Synthesis and Characterization of Dendrimer-Encapsulated Bimetallic Core-Shell PdPt Nanoparticles

Using a successive method, PAMAM dendrimer-encapsulated bimetallic PdPt nanoparticles have been successfully prepared with core-shell structures （Pd@Pt DENs）. Evidenced by UV-vis spectra, high resolution trans- mission electron microscopy, and X-ray energy dispersive spectroscopy （EDS）, the obtained...

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Bibliographic Details
Published in:	Chinese journal of chemistry Vol. 30; no. 3; pp. 541 - 546
Main Author:	李国平卢文婷罗运军夏敏柴春鹏王晓青
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY-VCH Verlag 01-03-2012 WILEY‐VCH Verlag Wiley Subscription Services, Inc
Subjects:	core-shell nanoparticles dendrimer-encapsulated nanoparticles (DENs) infrared carbon monoxide (IR-CO) probe Microstructure PAMAM树形分子 poly(amidoamine) (PAMAM) dendrimer Pt纳米粒子 Spectrum analysis 双金属合成壳牌封装紫外可见光谱表征
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Summary:	Using a successive method, PAMAM dendrimer-encapsulated bimetallic PdPt nanoparticles have been successfully prepared with core-shell structures （Pd@Pt DENs）. Evidenced by UV-vis spectra, high resolution trans- mission electron microscopy, and X-ray energy dispersive spectroscopy （EDS）, the obtained Pd@Pt DENs are monodispersed and located inside the cavity of dendrimers, and they show a different structure from monometallic Pt or Pd and alloy PdPt DENs. The core-shell structure of Pd@Pt DENs is further confirmed by infrared measure- ments with carbon monoxide （IR-CO） probe. In order to prepare Pd@Pt DENs, a required Pd/Pt ratio of 1 ： 2 is de- termined for the Pt shell to cover the Pd core completely. Finally, a mechanism for the formation of Pd@Pt DENs is proposed.
Bibliography:	31-1547/O6 Li, Guoping Lu, Wenting Luo, Yunjun Xia, Min Chai, Chunpeng Wang, Xiaoqing School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China Using a successive method, PAMAM dendrimer-encapsulated bimetallic PdPt nanoparticles have been successfully prepared with core-shell structures （Pd@Pt DENs）. Evidenced by UV-vis spectra, high resolution trans- mission electron microscopy, and X-ray energy dispersive spectroscopy （EDS）, the obtained Pd@Pt DENs are monodispersed and located inside the cavity of dendrimers, and they show a different structure from monometallic Pt or Pd and alloy PdPt DENs. The core-shell structure of Pd@Pt DENs is further confirmed by infrared measure- ments with carbon monoxide （IR-CO） probe. In order to prepare Pd@Pt DENs, a required Pd/Pt ratio of 1 ： 2 is de- termined for the Pt shell to cover the Pd core completely. Finally, a mechanism for the formation of Pd@Pt DENs is proposed. poly（amidoamine）（PAMAM） dendrimer, dendrimer-encapsulated nanoparticles （DENs）, infrared car-bon monoxide （IR-CO） probe, core-shell nanoparticles ArticleID:CJOC201100170 the State Key Laboratory of Chemical Resource Engineering and Excellent Young Scholars Research Fund of Beijing Institute of Technology ark:/67375/WNG-1VLMJBJQ-1 istex:5769D989FFDA5D78B665833A0A34AF09D835F08D
ISSN:	1001-604X 1614-7065
DOI:	10.1002/cjoc.201100170