INTERACTION OF H2O WITH CO(11(2)OVER-BAR-0) - A PHOTOELECTRON SPECTROSCOPIC STUDY

被引：17

作者：

GRELLNER, F ^{[1
]}

KLINGENBERG, B ^{[1
]}

BORGMANN, D ^{[1
]}

WEDLER, G ^{[1
]}

机构：

[1] UNIV ERLANGEN NURNBERG,INST PHYS & THEORET CHEM,EGERLANDSTR 3,D-91058 ERLANGEN,GERMANY

来源：

SURFACE SCIENCE | 1994年 / 312卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(94)90811-7

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：

Adsorption of water on the hexagonal Co(1120BAR) surface is studied at temperatures between 100 and 500 K by means of photoelectron spectroscopy (XPS, UPS) and change in work function (DELTAphi). Molecular adsorption at 100 K is accompanied by the formation of small amounts of OH in the submonolayer range. In XPS, mono- and bilayer show O 1s binding energies different from those of the multilayer. A calibration of the coverage can be obtained from work function data. When the multilayer builds up, charging of the sample is observed in UPS. When the temperature is increased, desorption of the multilayer occurs at 150 K. After desorption of the monolayer, OH remains on the surface. This species seems to be able to stabilize small amounts of molecular water. Disproportionation of OH takes place at 270 K, leaving oxygen on the surface.

引用

页码：143 / 150

页数：8

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