New opportunities for the identification of oxide clusters in supported Ru/MgO catalysts

被引：0
|
作者：
Yu. V. Larichev
S. E. Malykhin
机构：
[1] Russian Academy of Sciences,Boreskov Institute of Catalysis, Siberian Branch
来源：
Kinetics and Catalysis | 2008年 / 49卷
关键词：
Ruthenium; Unit Cell Parameter; Oxide Cluster; Ruthenium Oxide; Valence Band Spectrum;
D O I：
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学科分类号：
摘要：
The Ru/MgO systems were studied using XPS, transmission electron microscopy, and X-ray diffraction analysis. It was found that from 25 to 75% of the supported metal can occur in an X-ray amorphous form with a particle size of smaller than 3 nm. The insertion of supported metal ions into the support structure was absent. A comparison between the valence band XPS spectra and the corresponding densities of states calculated by quantum-chemical methods indicated that the X-ray amorphous portion of the metal can occur as both metal and oxide clusters depending on the precursor of ruthenium.
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页码：581 / 586
页数：5
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