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ADSORPTION AND REACTION ON OXIDE SURFACES - CO AND CO2 ON CR2O3(111)
被引：115
作者：
KUHLENBECK, H
XU, C
DILLMANN, B
HASSEL, M
ADAM, B
EHRLICH, D
WOHLRAB, S
FREUND, HJ
DITZINGER, UA
NEDDERMEYER, H
NEUBER, M
NEUMANN, M
机构：
[1] RUHR UNIV BOCHUM,INST EXPTL PHYS,W-4630 BOCHUM,GERMANY
[2] UNIV OSNABRUCK,FACHBEREICH PHYS,W-4500 OSNABRUCK,GERMANY
来源：
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS
|
1992年
/
96卷
/
01期
关键词：
ADSORPTION;
SPECTROSCOPY;
PHOTOELECTRON;
SURFACES;
D O I：
10.1002/bbpc.19920960104
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：
We have investigated the adsorption of CO and CO2 on epitaxially grown Cr2O3(111) by means of EELS, LEED, ARUPS, NEXAFS and XPS. CO is found to adsorb on the oxide surface in an ordered (square-root 3 x square-root 3)R30-degrees structure with the molecular axis oriented approximately parallel to the surface. CO2 on the other hand reacts with the chromium oxide to form a surface carbonate. Adsorption of CO, respectively reaction of CO2 only takes place on a clean. freshly flashed oxide surface. Preadsorption of oxygen leads to a surface which is rather inert to adsorption, likely due to electronic or steric reasons.
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页码：15 / 27
页数：13
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