THE ROLE OF ADSORBATE OVERLAYERS IN THIOPHENE HYDRODESULFURIZATION OVER MOLYBDENUM AND RHENIUM SINGLE CRYSTALS

被引：23

作者：

Bussel, Mark E. ^{[1
]}

Gellman, Andrew J. ^{[2
]}

Somorjai, Gabor A.

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

来源：

CATALYSIS LETTERS | 1988年 / 1卷 / 6-7期

关键词：

D O I：

10.1007/BF00766174

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：

Thiophene hydrodesulfurization (HDS) has been investigated over model single crystal catalysts of molybdenum and rhenium. Thiophene HDS is a structure sensitive reaction over rhenium and a structure insensitive reaction over molybdenum. Adsorbed sulfur decreases the activity of both Re(0001) and Mo(100) surfaces while adsorbed carbon has distinctly different effects on the catalytic properties of the two metals. Carbon overlayers deactivate the Re(0001) surface but have no effect on the HDS activity of the Mo(100) surface. Radiotracer S-35 and C-14 studies indicate that HDS occurs on an adsorbate overlayer on molybdenum comprised primarily of carbon. HDS over rhenium, on the other hand, occurs on the bare metal surface. This appears to be responsible for the observed differences in the influence of surface structure on HDS activity.

引用

页码：195 / 201

页数：7