CO adsorption on Al2O3-supported Pd clusters:: XPS study

被引：16

作者：

Johánek, V ^{[1
]}

Stará, I ^{[1
]}

Tsud, N ^{[1
]}

Veltruská, K ^{[1
]}

Matolín, V ^{[1
]}

机构：

[1] Charles Univ, Fac Math & Phys, Dept Elect & Vacuum Phys, CR-18000 Prague 8, Czech Republic

来源：

APPLIED SURFACE SCIENCE | 2000年 / 162卷

关键词：

palladium clusters; carbon monoxide; aluminium; alumina; oxide; X-ray photoelectron spectroscopy (XPS); dissociation; surface reaction; adsorption; metal-substrate interaction;

D O I：

10.1016/S0169-4332(00)00270-1

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 adsorption of carbon monoxide on small alumina-supported Pd particles have been studied by X-ray photoelectron spectroscopy (XPS). The results showed clearly different surface properties of bulk metal and supported clusters. The effect of partial CO dissociation was observed on Pd deposited on gamma-alumina and on clean aluminium, but not on small Pd particles prepared on thin amorphous oxide film on Al substrate. CO-Pd interaction was determined from C 1s photoelectron spectra that exhibited two CO-related components. The dissociation activity was monitored as a rise of C 1s signal at 285 eV, while the molecularly adsorbed CO exhibited the intensity at 287 eV. The study showed that beside the particle size, the metal-substrate interaction (MSI) plays an important role in CO-Pd adsorption process. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：679 / 684

页数：6

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