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

被引：6

作者：

Ashour, SS

Bailie, JE

Rochester, CH

Thomson, J

Hutchings, GJ

机构：

[1] UNIV DUNDEE,DEPT CHEM,DUNDEE DD1 4HN,SCOTLAND

[2] UNIV LIVERPOOL,DEPT CHEM,LEVERHULME CTR INNOVAT CATALYSIS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND

来源：

CATALYSIS LETTERS | 1997年 / 46卷 / 3-4期

关键词：

Pd-Cu catalysts; SO2; adsorption; sulphur poisoning;

D O I：

10.1023/A:1019062300823

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：

Infrared spectra are reported of Pd/SiO2 and Pd-Cu/SiO2 exposed at 295 K to either CO followed by SO2 or SOz 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.

引用

页码：181 / 185

页数：5

共 30 条

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