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Вид документа : Статья из журнала
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Автор(ы) : Belousov O. V., Belousova N. V., Sirotina A. V., Solovyov L. A., Zhyzhaev A. M., Zharkov S. M., Mikhlin Y. L.
Заглавие : Formation of bimetallic Au-Pd and Au-Pt nanoparticles under hydrothermal conditions and microwave irradiation
Место публикации : Langmuir: American Chemical Society, 2011. - Vol. 27, Is. 18. - P.11697-11703. - ISSN 0743-7463, DOI 10.1021/la202686x
Примечания : Cited References: 28
Предметные рубрики: PROFILE REFINEMENT
PALLADIUM BLACK
SIZE
CATALYSIS
METAL
Аннотация: The reduction of chlorocomplexes of gold(III) from muriatic solutions by nanocrystal powders of palladium and platinum at 110 and 130 degrees 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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