INTERACTION OF CARBON-DIOXIDE WITH POTASSIUM-PROMOTED FE(110) .2. TEMPERATURE-DEPENDENT REACTIONS

被引：16
|
作者：
MEYER, G [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)00501-X
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 temperature-dependent reactions of carbon dioxide and potassium coadsorbed on Fe(110) have been studied between 85 and 700 K by means of UV photoelectron spectroscopy (WS) and X-ray photoelectron spectroscopy (XPS). Since five different species are formed at 85 K (O-ox, CO, CO3n-, CO2 and a further species, probably of the composition C2O4m-), the thermal behaviour of the system is rather complex. However, quantification of the O 1s spectra by applying Gaussian fits allows a rather detailed description of the reaction paths. There are two ranges of potassium coverage, which exhibit big differences concerning the thermal stability of the carbonate species: small and medium coverages (up to 60% of a monolayer) and high coverages (exceeding 80% of a monolayer). They are separated by a narrow transition range.
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页码：123 / 133
页数：11
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