Synthesis and characterization of flower-shaped porous Au-Pd alloy nanoparticles

被引：155

作者：

Lee, Young Wook

Kim, Nam Hoon

Lee, Kang Yeol

Kwon, Kihyun

Kim, Minjung

Han, Sang Woo ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, Res Inst Nat Sci, Dept Chem, Jinju 660701, South Korea

[2] Gyeongsang Natl Univ, Environm Biotechnol Natl Core Res Ctr, Jinju 660701, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 17期

关键词：

D O I：

10.1021/jp710933d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A facile synthesis of flower-shaped porous Au-Pd alloy nanoparticles with ascorbic acid as a reductant and PVP as a stabilizing agent is presented. The alloy nanoparticles were prepared from the aqueous solutions of HAuCl4/K2PdCl4 mixtures in molar ratios of 3: 1, 1: 1, and 1:3. The size, structure, optical properties, and composition distribution of the synthesized Au-Pd alloy nanoparticles were characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, UV-vis spectroscopy, and X-ray diffraction. The experimental results for the bimetallic systems and the physical mixtures of individual monometallic nanoparticles revealed that unstable small nanoparticles aggregate into the three-dimensional flower-shaped nanoparticles and the prepared nanoparticles are Au-Pd alloys. The surfaces of Au-Pd alloy nanoparticles were characterized by cyclic voltammetry measurement in 0.1 M HClO4 and surface-enhanced Raman scattering spectra of 1,4-phenylene diisocyanide adsorbed thereon. All alloy nanoparticles have a Pd-enriched surface.

引用

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页码：6717 / 6722

页数：6

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