High-pressure studies of CO adsorption on Pd(111) by X-ray photoelectron spectroscopy and sum-frequency generation

被引：89

作者：

Kaichev, VV

Prosvirin, IP

Bukhtiyarov, VI

Unterhalt, H

Rupprechter, G

Freund, HJ

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[2] RAS, Boreskov Inst Catalysis, SB, Novosibirsk 630090, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 15期

关键词：

D O I：

10.1021/jp021992t

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：

High-pressure CO adsorption on Pd(111) was examined by X-ray photoelectron spectroscopy (XPS) and vibrational sum frequency generation (SFG) from 200 to 400 K, and in a pressure range from 10(-6) to 1 mbar. Even in the millibar regime both methods indicated that CO adsorbed in "regular" adsorption sites such as hollow, bridge, and on-top. By combination of XPS and SFG, a quantitative analysis of CO coverages at various pressures was performed. At high pressure, no CO structures different from those known from UHV studies were observed. Also, no indications of CO dissociation or carbonyl formation were found under the given experimental conditions, provided that the CO gas was sufficiently cleaned.

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页码：3522 / 3527

页数：6

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