MAGNETIC-RESONANCE STUDIES OF PROPENE ADSORPTION ON ALUMINA-SUPPORTED PLATINUM SURFACES

被引：5
作者：
GRIFFITHS, JM
BELL, AT
REIMER, JA
机构：
[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 07期
关键词：
D O I：
10.1021/j100058a033
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Carbon-13 and deuterium magnetic resonance data for propene adsorbed on high dispersion, alumina-supported platinum surfaces were obtained after adsorption at various temperatures and thermal treatments. Propene labeled with carbon-13 in the 1-position was found to scramble to the 3-position after exposure to 5% Pt/Al2O3, suggesting the formation of a short-lived propene allyl species. This species converts to a strongly adsorbed di-sigma-bonded configuration. Upon warming to 323 K, adsorbed propene is partially converted to propylidene. Our results indicate that propylidene decomposes to dehydrogenated surface carbon at elevated temperatures; neither ethylidene nor ethylidyne forms as a consequence of this decomposition.
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页码：1918 / 1925
页数：8
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