Surface studies and catalytic properties of the bifunctional bulk MoO2 system

被引:39
作者
Katrib, A
Sobczak, JW
Krawczyk, M
Zommer, L
Benadda, A
Jablonski, A
Maire, G
机构
[1] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland
[2] Univ Strasbourg 1, LERCSI, UMR 7515, CNRS,ECPM, F-67087 Strasbourg, France
关键词
molybdenum dioxide catalysts; XPS; EPES; alkane isomerization;
D O I
10.1002/sia.1288
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
X-ray photoelectron spectroscopy measurements of commercial bulk MoO2 revealed the presence Of MoO3 and Mo2O5 phases in the sample surface region. In situ hydrogen reduction at different temperatures up to 650 K enabled to be reduced Mo6+ and Mo5+ to Mo4+. Bulk MoO2 as prepared by hydrogen reduction of the initial samples showed very interesting catalytic properties in terms of isomerization reactions of alkanes. This catalytic activity was attributed to the MoO2 phase on the surface, which had both metallic and acidic functions (bifunctional mechanism). In addition, inelastic mean free paths in MoO2 catalyst were measured experimentally by elastic peak electron spectroscopy (EPES). Copyright (C) 2002 John Wiley Sons, Ltd.
引用
收藏
页码:225 / 229
页数:5
相关论文
共 22 条