A NEXAFS STUDY OF AN ORDERED STOICHIOMETRIC COADSORPTION SYSTEM - C(2X2)-(K+CO) ON CO(10(1)OVER-BAR0)

被引：7

作者：

GLEESON, M

BARNES, CJ

ATREI, A

SURMAN, M

机构：

[1] DUBLIN CITY UNIV, SCH CHEM SCI, DUBLIN 9, IRELAND

[2] UNIV FLORENCE, DIPARTIMENTO CHIM, I-50129 FLORENCE, ITALY

[3] DRAL, DARESBURY LAB, WARRINGTON WA4 4AD, CHESHIRE, ENGLAND

来源：

SURFACE SCIENCE | 1995年 / 331卷 / pt A期

关键词：

ADATOMS; ALKALI METALS; CARBON MONOXIDE; CHEMISORPTION; COBALT; LOW INDEX SINGLE CRYSTAL SURFACES; NEAR EDGE EXTENDED X-RAY ABSORPTION FINE STRUCTURE (NEXAFS); SOLID-GAS INTERFACES; SURFACE STRUCTURE;

D O I：

10.1016/0039-6028(95)00077-1

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：

We present an oxygen K-edge NEXAFS study of a c(2 x 2)-(K + CO) overlayer on Co{10 ($) over bar 10}. A potassium-induced increase in the CO intra-molecular bond length of 0.11 +/- 0.04 Angstrom has been deduced based on the alkali-induced shift of the sigma shape resonance. The polarisation dependence of the pi and sigma resonances indicate that the molecule adopts an upright orientation (+/-10 degrees). An additional resonance located between the pi and sigma peaks has been observed for the co-adsorption system exhibiting a polarisation dependence similar to the pi resonance. Possible explanations of the origin of this feature are suggested.

引用

页码：47 / 51

页数：5

共 21 条

[1] BONDING AND THERMAL-STABILITY OF CO ON POTASSIUM-DOPED CO(1010-BAR) [J].