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Ar assisted carbidization of TiO2 (1 1 0) supported Mo nanoparticles by decomposition of C2H4 |
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| Authors: | A. Berkó ,A.M. Kiss,F. &Scaron utara |
| Affiliation: | a Reaction Kinetics Research Group of the Hungarian Academy of Sciences, University of Szeged, H-6701 Szeged, P.O. Box 168, Hungary b Department of Thin Films, Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10, 162 53 Prague, Czech Republic c Department of Surface and Plasma Physics, Charles University in Prague, V Holesovickach 2, 180 00 Prague 8, Czech Republic |
| Abstract: | Ar+ assisted carbidization of Mo nanoparticles supported on TiO2 (1 1 0) is studied by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). In order to activate the diffusion of carbon into the bulk of Mo nanoparticles we applied Ar ions (1 keV) during the exposure of C2H4. XPS exhibited that the decomposition of C2H4 at 850 K accompanied by ion bombardment results in an almost complete carbidization of nanocrystalline Mo while this treatment performed without ion bombardment results only in the carbidization of the particle surface. The modification of the crystallinity of the Mo-carbide particles was deduced from STM measurements. |
| Keywords: | Mo TiO2 (1 1 0) C2H4 Ar+ assisted process Supported MoxC nanoparticles STM XPS |
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