Formation of Bimetallic Au-Pd and Au-Pt Nanoparticles under Hydrothermal Conditions and Microwave Irradiation

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 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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Издание

Журнал: LANGMUIR

Выпуск журнала: Vol. 27, Is. 18

Номера страниц: 11697-11703

ISSN журнала: 07437463

Место издания: WASHINGTON

Издатель: AMER CHEMICAL SOC

Авторы

  • Belousov O.V. (Institute of Chemistry and Chemical Technology,Russian Academy of Sciences)
  • Solovyov L.A. (Institute of Chemistry and Chemical Technology,Russian Academy of Sciences)
  • Zhyzhaev A.M. (Institute of Chemistry and Chemical Technology,Russian Academy of Sciences)
  • Mikhlin Y.L. (Institute of Chemistry and Chemical Technology,Russian Academy of Sciences)
  • Belousova N.V. (Siberian Federal University)
  • Sirotina A.V. (Siberian Federal University)
  • Zharkov S.M. (L. V. Kirensky Institute of Physics,Russian Academy of Sciences)

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