Infrared reflection absorption study of carbon monoxide adsorption on Cu(100)-(2x2)p4g-Pd ordered alloy surface

被引：14

作者：

Wadayama, T ^{[1
]}

Sasaki, Y ^{[1
]}

Shiomitsu, K ^{[1
]}

Hatta, A ^{[1
]}

机构：

[1] Tohoku Univ, Dept Mat Sci, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

SURFACE SCIENCE | 2005年 / 592卷 / 1-3期

关键词：

palladium; copper; infrared absorption spectroscopy; LEED; carbon monoxide; single crystal surfaces; surface alloys;

D O I：

10.1016/j.susc.2005.06.083

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：

Carbon monoxide (CO) adsorption on a Cu(1 0 0)-(2 x 2)p4g-Pd surface was investigated using infrared reflection absorption spectroscopy (IRRAS). The IRRAS spectra recorded during CO exposure to the room-temperature p4g surface show that marked absorptions that are ascribable to linearly bonded and bridge-bonded CO on I'd atoms dominate the spectra. In contrast, when the p4g surface is exposed to CO at 90 K, those two absorption bands appear first. Subsequently, a new band emerges at the high-frequency side of the linearly bonded CO-Pd band. The new band increases in intensity with further CO exposure, accompanied by a reduction in the CO-Pd band intensity. Based on IRRAS results obtained by heating the substrate, additional adsorption of CO onto the Cu atom surrounded by the CO-adsorbed Pd atoms correlates to the new band. The outermost atomic structure of the p4g surface is discussed based on those IRRAS results. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：72 / 82

页数：11

共 28 条

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