Original scientific paper
Molecular beam study of oxygen chemisorption on g-alumina supported Pd particles
Iva Stará
; Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešoviekách 2, 18000 Prague 8, Czech Republic
Vladimír Matolín
; Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešoviekách 2, 18000 Prague 8, Czech Republic
Abstract
The adsorption of oxygen on γ-alumina supported Pd particles and Pd(111) single crystal has been studied by means of the thermal molecular beam technique at temperatures between 300 and 550 K. The temperature and coverage dependent sticking coefficient has been measured for all samples. In the case of small particles, the initial integral sticking coefficient increased after the first oxygen saturation and its value was found to be abnormally high. These effects can be explained by the diffusion of oxygen across the support surface and/or by the oxygen induced reconstruction of supported palladium particles.
Keywords
Hrčak ID:
299465
URI
Publication date:
2.5.1995.
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