ORIENTATION OF A MOLECULAR PRECURSOR - A NEXAFS STUDY OF O2/AG(110)

被引：66

作者：

GUEST, RJ ^{[1
]}

HERNNAS, B ^{[1
]}

BENNICH, P ^{[1
]}

BJORNEHOLM, O ^{[1
]}

NILSSON, A ^{[1
]}

PALMER, RE ^{[1
]}

MARTENSSON, N ^{[1
]}

机构：

[1] UNIV UPPSALA,DEPT PHYS,S-75121 UPPSALA,SWEDEN

来源：

SURFACE SCIENCE | 1992年 / 278卷 / 03期

关键词：

D O I：

10.1016/0039-6028(92)90660-X

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 the results of a near-edge X-ray absorption fine structure (NEXAFS) study of physisorbed and chemisorbed molecular oxygen on Ag(110). The physisorbed species was found to lie down on the surface for the monolayer case (with a mean tilt of 29-degrees +/- 5-degrees away from the surface) and with the molecular axis lying along the [001] direction; this is perpendicular to the conventionally held azimuthal orientation of the chemisorbed molecule. For the chemisorbed phase, our spectra show features not seen in earlier studies; these cannot be interpreted in terms of the orbitals of the free molecules and imply both the pi and pi* oxygen molecular orbitals are involved in bonding with the substrate.

引用

页码：239 / 245

页数：7

共 25 条

[1]

ANDERSEN JN, 1991, SYNCHROTRON RAD NEWS, V4, P19

[2] ADSORPTION OF OXYGEN ON AG(110) STUDIED BY HIGH-RESOLUTION ELS AND TPD [J].