Synthesis and characterization of dendrimer-encapsulated bimetallic core-shell PdPt nanoparticles

Guoping Li; Wenting Lu; Yunjun Luo; Min Xia; Chunpeng Chai; Xiaoqing Wang

doi:10.1002/cjoc.201100170

Synthesis and characterization of dendrimer-encapsulated bimetallic core-shell PdPt nanoparticles

Guoping Li, Wenting Lu, Yunjun Luo^*, Min Xia, Chunpeng Chai, Xiaoqing Wang

^*Corresponding author for this work

Central South University

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	541-546
Number of pages	6
Journal	Chinese Journal of Chemistry
Volume	30
Issue number	3
DOIs	https://doi.org/10.1002/cjoc.201100170
Publication status	Published - Mar 2012
Externally published	Yes

Keywords

core-shell nanoparticles
dendrimer-encapsulated nanoparticles (DENs)
infrared carbon monoxide (IR-CO) probe
poly(amidoamine) (PAMAM) dendrimer

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10.1002/cjoc.201100170

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title = "Synthesis and characterization of dendrimer-encapsulated bimetallic core-shell PdPt nanoparticles",

abstract = "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.",

keywords = "core-shell nanoparticles, dendrimer-encapsulated nanoparticles (DENs), infrared carbon monoxide (IR-CO) probe, poly(amidoamine) (PAMAM) dendrimer",

author = "Guoping Li and Wenting Lu and Yunjun Luo and Min Xia and Chunpeng Chai and Xiaoqing Wang",

year = "2012",

month = mar,

doi = "10.1002/cjoc.201100170",

language = "English",

volume = "30",

pages = "541--546",

journal = "Chinese Journal of Chemistry",

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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

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DO - 10.1002/cjoc.201100170

M3 - Article

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SN - 1001-604X

VL - 30

SP - 541

EP - 546

JO - Chinese Journal of Chemistry

JF - Chinese Journal of Chemistry

IS - 3

ER -

Synthesis and characterization of dendrimer-encapsulated bimetallic core-shell PdPt nanoparticles

Abstract

Keywords

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