Large solid angle X-ray photoelectron intensity distributions from CO, methoxy, and formate adsorbed on Ni(110)

被引：11

作者：

Emundts, A ^{[1
]}

Pirug, G ^{[1
]}

Werner, J ^{[1
]}

Bonzel, HP ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Grenzflachenforsch & Vakuumphys, D-52425 Julich, Germany

来源：

SURFACE SCIENCE | 1998年 / 410卷 / 2-3期

关键词：

adsorbate orientation; chemisorption; molecular structure; photoelectron diffraction;

D O I：

10.1016/S0039-6028(98)00233-7

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：

Adsorbed layers of CO, methoxy (CH(3)O) and formate (HCOO) on a clean Ni(110) surface are investigated by angle-resolved X-ray photoelectron spectroscopy. Large solid angle stereographic projections of C 1s or O 1s core level intensity measured for these adsorbates at 85 K show strong forward scattering enhancements that unambiguously and rather directly determine the molecular orientation, and in the case of CO, the order within the layer. CO in the (2 x 1) p2mg structure and methoxy are tilted by 20 degrees and 30 degrees relative to the normal, respectively, with the projection of the tilt in the [001] azimuth. Formate is bonded through oxygen in the bidendate configuration, aligned along the [110] azimuth; The O-C-O bond angle is determined as 124 degrees. These results are in good agreement with previous data. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：L727 / L735

页数：9

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