A surface core-level shift study of hydrogen interaction with Rh(111)

被引：13

作者：

Weststrate, CJ

Baraldi, A

Rumiz, L

Lizzit, S

Comelli, G

Rosei, R

机构：

[1] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[2] Leiden Univ, Inst Chem, NL-2333 CC Leiden, Netherlands

[3] INFM, Lab TASC, I-34012 Trieste, Italy

[4] Sincrotrone Trieste, I-34012 Trieste, Italy

来源：

SURFACE SCIENCE | 2004年 / 566卷

关键词：

synchrotron radiation photoelectron spectroscopy; chemisorption; rhodium; hydrogen atom; low index single crystal surfaces;

D O I：

10.1016/j.susc.2004.05.089

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 hydrogen with the Rh(1 1 1) surface was studied by means of high-resolution real-time X-ray core-level photoemission. The analysis of the intensity of the Rh3d(5/2) core-level components was used to determine the hydrogen adsorption sites as a function of the hydrogen dose. While at low coverage only three-fold adsorption sites are occupied, at higher hydrogen concentrations bridge species are also present. The temperature dependence of the core-level spectra indicates that during desorption, surface depopulation occurs in an almost reverse order with respect to the adsorption process. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：486 / 491

页数：6

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