DECARBONYLATION AND HYDROGENATION REACTIONS OF ALLYL ALCOHOL AND ACROLEIN ON PD(110)

被引：37

作者：

SHEKHAR, R

BARTEAU, MA

机构：

[1] Center for Catalytic Science and Technology, Department of Chemical Engineering, University of Delaware, Newark

来源：

SURFACE SCIENCE | 1994年 / 319卷 / 03期

关键词：

D O I：

10.1016/0039-6028(94)90597-5

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：

Allyl alcohol and acrolein reactions on the Pd(110) surface were investigated using temperature programmed desorption. For both unsaturated oxygenates, three coverage-dependent reaction pathways were observed. At low coverages, allyl alcohol decomposed completely to CO, hydrogen and carbonaceous species on the surface. For theta>0.15 monolayer, ethylene (and small amounts of ethane) desorbed at ca. 295 K. Near saturation coverages, desorption of propanal was detected at ca. 235 K. The parent molecule, allyl alcohol, desorbed only after exposures sufficient to saturate these channels. Acrolein decomposition spectra were similar to those observed for allyl alcohol decomposition on the clean surface. Additional experiments with allyl alcohol on hydrogen- and deuterium-precovered Pd(110) surfaces demonstrated increased hydrogenation of the C-2-hydrocarbon products along with hydrogenation of allyl alcohol to 1-propanol. However, in contrast to previous results for allyl alcohol on the Pd(111) surface, there was no evidence for C-O scission reactions of any C-3 oxygenate on Pd(110).

引用

页码：298 / 314

页数：17

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