Valence State Study of Supported Ruthenium Ru/MgO Catalysts
The Journal of Physical Chemistry C
, E-ISSN: 1932-7455
Larichev Yurii V.
Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk, 630090, Russia
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.