COADSORPTION OF CS AND HYDROGEN ON W(110) STUDIED BY METASTABLE IMPACT ELECTRON-SPECTROSCOPY

被引：86

作者：

MAUSFRIEDRICHS, W

WEHRHAHN, M

DIECKHOFF, S

KEMPTER, V

机构：

[1] Physikalisches Institut der TU Clausthal

来源：

SURFACE SCIENCE | 1990年 / 237卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(90)90537-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 adsorption of hydrogen and Cs alone as well as the coadsorption of Cs and hydrogen on W(110) was studied by metastable impact electron spectroscopy (MIES) and supplemented by UPS, AES, and work function measurements. The main conclusions are: (a) ionization of the Cs(6s) level is not observed for Cs coverages θCs ≤ 0.4 ML, (b) the formation of a H(1S)-metal bond occurs at a binding energy of EB = 4.7 eV, (c) upon Cs and hydrogen coadsorption an independent layer of hydrogen is formed between the substrate and the Cs adlayer. The charge density of the Cs adlayer is lowered by about 25% upon the formation of the hydrogen intermediate layer. © 1990.

引用

页码：257 / 265

页数：9

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