Тип публикации: статья из журнала
Год издания: 2011
Идентификатор DOI: 10.1021/la202686x
Ключевые слова: Bimetallic particles, Chemical method, Chloro-complexes, Conventional heating, Core shell structure, Gold layer, Homogeneous materials, Hydrothermal conditions, Nanocrystal powders, Reductants, Solid-phase, Synthesis of particles, Gold, Gold compounds, Irradiation, Palladium, Photoelectron spectroscopy, Platinum, Transmission electron microscopy, X ray diffraction, X ray photoelectron spectroscopy, Microwave irradiation
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 electroПоказать полностьюn 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.
Журнал: LANGMUIR
Выпуск журнала: Vol. 27, Is. 18
Номера страниц: 11697-11703
ISSN журнала: 07437463
Место издания: WASHINGTON
Издатель: AMER CHEMICAL SOC