A HREELS INVESTIGATION OF ETHYLENE ON PT MODEL CATALYSTS

被引：11

作者：

HENSLEY, DA ^{[1
]}

KESMODEL, LL ^{[1
]}

机构：

[1] INDIANA UNIV,INST MAT RES,BLOOMINGTON,IN 47405

来源：

SURFACE SCIENCE | 1990年 / 231卷 / 03期

关键词：

D O I：

10.1016/0039-6028(90)90205-M

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：

The adsorption of C2H4 on supported Pt model catalysts is investigated with high resolution electron energy loss spectroscopy for the cases of Pt vapor deposited on an oxidized Al foil and a single crystal of TiO2. At 160 K the HREELS spectra show evidence of the di-σ bonded ethylene species present on the supported Pt clusters, but upon warming to 325 K, only the TiO2 supported model catalyst shows evidence of forming the ethylidyne species commonly seen on Pt(111) single crystals. The oxidized Al supported species begins to decompose by 250 K, and no spectra characteristic of ethylidyne has been seen. In the case of the TiO2 supported model catalyst, we believe this is the first HREELS observation of ethylidyne on supported metal clusters. © 1990.

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页码：361 / 367

页数：7

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