Heats of adsorption of the linear CO species on Pt/Al2O3 using infrared spectroscopy:: impact of the Pt dispersion

被引：71

作者：

Bourane, A ^{[1
]}

Bianchi, D ^{[1
]}

机构：

[1] Univ Lyon 1, LACE, UMR 5634, F-69622 Villeurbanne, France

来源：

JOURNAL OF CATALYSIS | 2003年 / 218卷 / 02期

关键词：

D O I：

10.1016/S0021-9517(02)00183-5

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：

In previous studies, it has been shown that the heats of adsorption at several coverages of each adsorbed CO species (linear, bridged, and threefold coordinated) on a 2.9% Pt/Al2O3 catalyst can be obtained from the change in the IR band area of each adsorbed CO species with the adsorption temperature T-a (in the 300-800 K range) at a constant CO partial pressure P-a. In the present study, this procedure is used to reveal the eventual impact of the Pt dispersion (range 0.44-0.75) on the heats of adsorption of the linear CO species adsorbed on several Pt/Al2O3 catalysts. It is shown that the Pt dispersion has no strong impact on this parameter at several coverage values. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：447 / 452

页数：6