TY - JOUR
T1 - Synthesis and characterization of dendrimer-encapsulated bimetallic core-shell PdPt nanoparticles
AU - Li, Guoping
AU - Lu, Wenting
AU - Luo, Yunjun
AU - Xia, Min
AU - Chai, Chunpeng
AU - Wang, Xiaoqing
PY - 2012/3
Y1 - 2012/3
N2 - 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 transmission 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 measurements with carbon monoxide (IR-CO) probe. In order to prepare Pd@Pt DENs, a required Pd/Pt ratio of 1:2 is determined for the Pt shell to cover the Pd core completely. Finally, a mechanism for the formation of Pd@Pt DENs is proposed.
AB - 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 transmission 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 measurements with carbon monoxide (IR-CO) probe. In order to prepare Pd@Pt DENs, a required Pd/Pt ratio of 1:2 is determined for the Pt shell to cover the Pd core completely. Finally, a mechanism for the formation of Pd@Pt DENs is proposed.
KW - core-shell nanoparticles
KW - dendrimer-encapsulated nanoparticles (DENs)
KW - infrared carbon monoxide (IR-CO) probe
KW - poly(amidoamine) (PAMAM) dendrimer
UR - http://www.scopus.com/inward/record.url?scp=84859063169&partnerID=8YFLogxK
U2 - 10.1002/cjoc.201100170
DO - 10.1002/cjoc.201100170
M3 - Article
AN - SCOPUS:84859063169
SN - 1001-604X
VL - 30
SP - 541
EP - 546
JO - Chinese Journal of Chemistry
JF - Chinese Journal of Chemistry
IS - 3
ER -