Transformation of Pd/SiO2 Catalysts During High Temperature Reduction

被引：0
|
作者：
Wojciech Juszczyk
Dariusz Łomot
Jerzy Pielaszek
Zbigniew Karpiński
机构：
[1] Polish Academy of Sciences,Department of Catalysis on Metals, Institute of Physical Chemistry
来源：
Catalysis Letters | 2002年 / 78卷
关键词：
high-temperature reduction (HTR) of Pd/SiO; Pd silicides (Pd; Si, Pd; Si) formation; 2,2-dimethylpropane conversion; isomerisation selectivity;
D O I：
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学科分类号：
摘要：
During reduction in dihydrogen at 873 K, a silica-supported palladium catalyst is initially converted to Pd4Si which further reacts with silicon-containing species to a Pd3Si phase. Such a stepwise phase change suggests that the mechanism of Pd silicide formation involves incorporation of silicon into a palladium phase, not vice versa, as was suggested in our previous work. This transformation has a great effect on catalytic properties of Pd–silica-containing systems in 2,2-dimethylpropane hydroconversion.
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页码：95 / 98
页数：3
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