ADSORPTION OF OXYGEN ON CU(100) .2. MOLECULAR ADSORPTION AND DISSOCIATION BY MEANS OF O-K-EDGE X-RAY-ABSORPTION FINE-STRUCTURE

被引：43

作者：

YOKOYAMA, T ^{[1
]}

ARVANITIS, D ^{[1
]}

LEDERER, T ^{[1
]}

TISCHER, M ^{[1
]}

TROGER, L ^{[1
]}

BABERSCHKE, K ^{[1
]}

COMELLI, G ^{[1
]}

机构：

[1] SINCROTRONE TRIESTE,I-34012 TRIESTE,ITALY

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.48.15405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural and dynamical properties of molecular oxygen in submonolayer coverage adsorbed on Cu(100) were investigated by means of oxygen K-edge photoabsorption. The adsorption geometry of the O-2 molecules, as well as the disorder and anharmonic contributions to the pair distribution function for the first-nearest-neighbor O-Cu shell were quantitatively determined for well-defined sequential molecular states of physisorption and chemisorption. The O-2 molecules are found to adsorb in a tilted configuration. Furthermore, the O-Cu interatomic pair potentials are estimated. It is found that the nearest-neighbor O-Cu bond varies only slightly as the strength of chemisorption increases, in opposition to a strong O-O bond length and other O-Cu pair-potential parameter variations.

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页码：15405 / 15416

页数：12

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