Valence State Study of Supported Ruthenium Ru/MgO Catalysts

详细信息    查看全文

• 作者：Yurii V. Larichev
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：September 25, 2008
• 年：2008
• 卷：112
• 期：38
• 页码：14776-14780
• 全文大小：201K
• 年卷期：v.112,no.38(September 25, 2008)
• ISSN：1932-7455

文摘

Ru/MgO catalysts have been studied by X-ray photoelectron spectroscopy, transmission electron microscopy, and X-ray diffraction. Significant part (up to 75%) of supported metal was found to exist in an X-ray amorphous state with the particle size smaller than 3 nm. The analysis of the spectra belonging to the core levels and the valence zone showed that the X-ray amorphous part of ruthenium may exist in the forms of both metal and oxide clusters and nanoparticles depending on the ruthenium precursor.