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
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
收藏
页码:447 / 452
页数:6
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