Effects of thiophene and sulfur dioxide on CO adsorption on cobalt/silica catalysts

被引：33

作者：

Bailie, JE

Rochester, CH

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：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1997年 / 93卷 / 13期

关键词：

D O I：

10.1039/a700803a

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：

FTIR spectra are reported showing the effects of thiophene on CO adsorption on Co3O4/SiO2 and Co/SiO2 catalysts and of SO2 on CO adsorption on Co/SiO2. Six types of cobalt adsorption site were present on reduced Co/SiO, and all could be poisoned by thiophene or SO2 at 295 K. SO2 was a stronger poison than thiophene and was more resistant than thiophene to desorption at elevated temperature. Chemisorption of SO2 poisoned low-coordination Co-0 sites more readily than Co-0 sites in low-index surface planes. Non-dissociative adsorption of thiophene blocked CO adsorption at 295 K but the thiophene was largely desorbed by evacuation at 473 K. Exposure of Co/SiO2 to thiophene at 373 K caused dissociative chemisorption and complete poisoning of all cobalt sites.

引用

收藏

页码：2331 / 2336

页数：6

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