Oxygen desorption from alpha -Al sub 2 O sub 3 (0001) supported Rh, Pt and Pd particles

Temperature-programmed desorption was used to study the interaction of oxygen with both large (around 10 nm) and small ( < 2 nm) Rh, Pt and Pd particles supported on alpha -Al sub 2 O sub 3 (0001). The results indicate that O sub 2 desorption from small particles of Pt and Pd occurs at a signific...

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Bibliographic Details
Published inSurface science Vol. 391; no. 1-3; pp. L1178 - L1182
Main Authors Putna, E S, Vohs, J M, Gorte, R J
Format Journal Article
LanguageEnglish
Published 26.11.1997
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Summary:Temperature-programmed desorption was used to study the interaction of oxygen with both large (around 10 nm) and small ( < 2 nm) Rh, Pt and Pd particles supported on alpha -Al sub 2 O sub 3 (0001). The results indicate that O sub 2 desorption from small particles of Pt and Pd occurs at a significantly higher temperature than that from the respective, low-index single crystal surfaces despite a much higher saturation oxygen coverage on the small particles. Possible explanations for the differences in O sub 2 desorption as a function of particle size for the various metals was discussed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0039-6028