OXIDATION OF A POTASSIUM MONOLAYER ON RU(001) STUDIED WITH PHOTOEMISSION, NEXAFS AND VIBRATIONAL EELS

被引:14
作者
HOFFMANN, FM
WEISEL, M
EBERHARDT, W
FU, ZG
机构
[1] Exxon Research and Engineering Co., Corporate Research Science Laboratories, Annandale
关键词
D O I
10.1016/0039-6028(90)90551-I
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 interaction of oxygen with a monolayer of potassium on a Ru(001) surface has been investigated with photoemission and NEXAFS. O 1s core-level data exhibit for low exposures of oxygen a single peak at 531.8 eV. This indicates together with the earlier observation of KO bond formation by EELS that a single KxOy species with equivalent oxygen atoms is formed. NEXAFS data indicate a partially filled O π* orbital and a strongly shifted σ-resonance. Photoemission, vibrational and Auger data suggest an ionic species which is close to potassium Superoxide with the OO bond oriented parallel to the surface. © 1990.
引用
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页码:L264 / L270
页数:7
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