Preparation of bimetallic Pd-Fe/Al2O3 catalysts by underpotential deposition of iron

被引：5
|
作者：
Bachir, R
Lafitte, E
Marecot, P
Didillon, B
Barbier, J
机构：
[1] Univ Poitiers, Catalyse Chim Organ Lab, CNRS, UMR 6503, F-86022 Poitiers, France
[2] Inst Francais Petr, F-92506 Rueil Malmaison, France
来源：
JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1997年 / 94卷 / 11-12期
关键词：
palladium; iron; underpotential deposition; isoprene; hydrogenation;
D O I：
10.1051/jcp/1997941906
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Bimetallic Pd-Fe/Al2O3 catalysts were prepared by underpotential deposition (UPD) of iron on parent Pd/Al2O3 catalysts of varying dispersion. The potential of palladium particles was controlled by the supplementary redox system H+/H-2. Iron introduced by this method improves the activity of small palladium particles for the hydrogenation of isoprene in the liquid phase. An explanation of this phenomenon would be a selective deposit of iron on or near the palladium sites of low coordination. However, the promoting effect of iron disappears after exposure of bimetallic catalysts to air and subsequent reduction.
引用
收藏
页码：1906 / 1913
页数：8
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