NO reaction over nanometer scale platinum clusters deposited on γ-alumina:: an XAS study

被引：32
作者：
Schneider, S
Bazin, D
Garin, F
Maire, G
Capelle, M
Meunier, G
Noirot, R
机构：
[1] Univ Paris Sud, LURE, F-91405 Orsay, France
[2] PSA, Ctr Tech Belchamp, F-25420 Voujeaucourt, France
[3] ECPM, LERCSI, UMR 7515, F-67087 Strasbourg, France
来源：
APPLIED CATALYSIS A-GENERAL | 1999年 / 189卷 / 01期
关键词：
sintering; platinum; NO; alumina; in situ EXAFS(+);
D O I：
10.1016/S0926-860X(99)00263-X
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：
An in situ EXAFS study has been done on a pre-reduced and pre-oxidised 1.16% Pt/gamma y-Al2O3 catalyst in order to determine the effect of 1% NO (balance N-2) versus temperature at atmospheric pressure on the platinum particles. Changes were observed in the crystallite morphologies from 200 degrees C due to sintering processes on the pre-reduced catalyst. On the pre-oxidised one, the phenomenon is much less pronounced. This study specifies the reactivity of platinum clusters deposited on gamma-alumina versus NO. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：139 / 145
页数：7
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