Structure-reactivity Correlations in the catalytic coupling of ethyne over novel bimetallic Pd/Sn catalysts
Data(s) |
10/04/1997
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Resumo |
<p>The structure, thermal stability, and catalytic behavior of a novel highly dispersed silica-supported Pd/Sn catalyst prepared by an organometallic route have been examined by X-ray photoelectron, X-ray diffraction, and X-ray absorption, fine structure spectroscopies, the latter two measurements being carried outwith an in situ reaction cell. Additional reactor measurements were performed on a more Sn-rich catalyst and on a pure Pd catalyst. Varying the temperature of reduction induced large variations in catalytic performance toward ethyne-coupling reactions. These changes are understandable in terms of the destruction of SnO2-like structures surrounding the Pd core, yielding a skin of metallic Sn which subsequently undergoes intermixing with Pd. The overall thermal and catalytic behavior of these highly dispersed materials accords well with the analogous single-crystal model system.</p> |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Lee , A F , Baddeley , C J , Hardacre , C , Moggridge , G D , Ormerod , R M & Lambert , R M 1997 , ' Structure-reactivity Correlations in the catalytic coupling of ethyne over novel bimetallic Pd/Sn catalysts ' Journal of Physical Chemistry B , vol 101 , no. 15 , pp. 2797-2805 . |
Palavras-Chave | #ACETYLENE #X-RAY PHOTOEMISSION #THERMAL-DECOMPOSITION #SUPPORTED PALLADIUM #BENZENE #ORGANOMETALLIC CHEMISTRY #SN/PT(111) SURFACE ALLOYS #SINGLE-CRYSTAL SURFACES #PARTICLE-SIZE #CONTROLLED HYDROGENOLYSIS |
Tipo |
article |