FTIR study of CO adsorption on Pd/SiO2 and Pd-Cu/SiO2 treated with sulphur dioxide

被引：0
|
作者：
S.S. Ashour
J.E. Bailie
C.H. Rochester
J. Thomson
G.J. Hutchings
机构：
来源：
Catalysis Letters | 1997年 / 46卷
关键词：
Sulphur Dioxide; Cationic Site; Crotonaldehyde; Sulphur Poisoning; Acetate Monohydrate;
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暂无
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学科分类号：
摘要：
Infrared spectra are reported of Pd/SiO2 and Pd-Cu/SiO2 exposed at 295 K to either CO followed by SO2 or SO2 followed by CO. Chemisorptive interaction of SO2 with bridging CO sites on Pd {100} faces created cationic Pd sites which adsorbed CO linearly. Multibonding CO sites on Pd {111} faces and linear CO sites were poisoned by weak non-dissociative SO2 adsorption, and could be regenerated by evacuation. Pd/SiO2 was more resistant than Cu/SiO2 to SO2 poisoning but for Pd-Cu/SiO2 the poisoning of Pd was promoted by the presence of Cu.
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页码：181 / 185
页数：4
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