INTERACTION OF CARBON-DIOXIDE WITH POTASSIUM-PROMOTED FE(110) .1. DEPENDENCE ON POTASSIUM COVERAGE AND CARBON-DIOXIDE EXPOSURE AT 85-K

被引：31
作者：
MEYER, G [1 ]
REINHART, E [1 ]
BORGMANN, D [1 ]
WEDLER, G [1 ]
机构：
[1] UNIV ERLANGEN NURNBERG,INST PHYS & THEORET CHEM,D-91058 ERLANGEN,GERMANY
来源：
SURFACE SCIENCE | 1994年 / 320卷 / 1-2期
关键词：
D O I：
10.1016/0039-6028(94)00500-1
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 carbon dioxide on potassium-covered Fe(110) at 85 K has been studied by means of UV photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and change in work function (Delta Phi). Only a small amount of carbon dioxide dissociates into carbon monoxide and oxygen. The main reaction occurring in the studied coverage range up to one monolayer of potassium is the formation of a carbonate species and carbon monoxide. After saturation with carbonate, linear carbon dioxide is adsorbed. For potassium coverages exceeding half a monolayer, a further species could be detected with UPS. Its chemical nature is discussed and a model of the reaction paths in the investigated system is developed.
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页码：110 / 122
页数：13
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