双金属片
钯
X射线光电子能谱
铂金
热液循环
纳米晶
材料科学
透射电子显微镜
金属
辐照
纳米颗粒
固溶体
化学工程
化学
纳米技术
催化作用
冶金
工程类
核物理学
物理
生物化学
作者
О. В. Белоусов,N. V. Belousova,Anastasia V. Sirotina,Leonid A. Solovyov,А. М. Жижаев,С. М. Жарков,Yu. L. Mikhlin
出处
期刊:Langmuir
[American Chemical Society]
日期:2011-08-25
卷期号:27 (18): 11697-11703
被引量:43
摘要
The reduction of chlorocomplexes of gold(III) from muriatic solutions by nanocrystal powders of palladium and platinum at 110 and 130 °C under hydrothermal conditions and the action of microwave irradiation has been investigated. The structure and composition of the solid phase have been characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and chemical methods. Bimetallic particles with a core-shell structure have been revealed. The obtained particles are established to have a core of the metal reductant covered with a substitutional solid (Au, Pd) solution in case of palladium, and isolated by a gold layer in the case of platinum. The main reason for such a difference is the ratio between the rates of aggregation and reduction. It has been shown by the example of the Au-Pd system that the use of microwave irradiation allows us not only to accelerate the synthesis of particles but also to obtain more homogeneous materials in comparison with conventional heating.
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