Article ID Journal Published Year Pages File Type
1554322 Superlattices and Microstructures 2009 8 Pages PDF
Abstract
We analyze gold nanoclusters as supported catalysts by extended X-ray absorption fine structure, X-ray diffraction and X-ray photoelectron spectroscopy in order to determine their local, global and electronic structure. The present study points out a strong deformation of the local structure of the metal due to its interaction with oxide supports. We determine the particle size distribution and microstrain functions of the Au nanoclusters by X-ray diffraction method. Based on X-ray absorption fine structure spectroscopy analysis we show that the entire local structure of the investigated systems is strongly distorted regarding the average Au-Au coordination number. The distances between atoms are practically the same as standard Au foil. The strong metal-support interaction is confirmed by the change in shape of the electron transition probability densities that appear in the Au LIII-edge. From XPS investigations we find electronic states corresponding to gold as well as to the oxide supports.
Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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