Physicochemical and catalytic properties of iron-doped silica - the effect of preparation and pretreatment methods

被引:40
作者
Decyk, P
Trejda, M
Ziolek, M
Kujawa, J
Glaszczka, K
Bettahar, M
Monteverdi, S
Mercy, M
机构
[1] Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland
[2] Univ Nancy 1, Fac Sci, Lab Catalyse Heterogene, F-54506 Vandoeuvre Les Nancy, France
关键词
D O I
10.1016/S0021-9517(03)00186-6
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
Chemical vapor deposition (1wt% of iron) and wet and wetness impregnations (both giving Fe loading of 1.6 and 2.9 wt%) have been applied for the formation of iron-doped silica. The obtained materials were characterized by means of low-temperature N-2 adsorption, XRD, TEM, H-2-TPR, ESR, and chernisorption of CO and O-2. Their catalytic activity was tested in isopropanol decomposition and oxidation of methanol to formaldehyde. Depending on the preparation procedure various levels and strengths of Fe-silica interactions were observed. The activation conditions determine the nature of the Fe species formed. Fe3+ isolated species are active in isopropanol dehydration whereas Fe-oxide centers exhibit very high selectivity in methanol oxidation to methylformate and formaldehyde. (C) 2003 Elsevier Inc. All rights reserved.
引用
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页码:146 / 155
页数:10
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