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Issue 13, 1997
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Effects of thiophene and sulfur dioxide on CO adsorption oncobalt/silica catalysts


FTIR spectra are reported showing the effects of thiophene on CO adsorption on Co 3 O 4 /SiO 2 and Co/SiO 2 catalysts and of SO 2 on CO adsorption on Co/SiO 2 . Six types of cobalt adsorption site were present on reduced Co/SiO 2 and all could be poisoned by thiophene or SO 2 at 295 K. SO 2 was a stronger poison than thiophene and was more resistant than thiophene to desorption at elevated temperature. Chemisorption of SO 2 poisoned low-coordination Co0 sites more readily than Co0 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/SiO 2 to thiophene at 373 K caused dissociative chemisorption and complete poisoning of all cobalt sites.

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Article type: Paper
DOI: 10.1039/A700803A
Citation: J. Chem. Soc., Faraday Trans., 1997,93, 2331-2336
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    Effects of thiophene and sulfur dioxide on CO adsorption on cobalt/silica catalysts

    J. E. Bailie, C. H. Rochester and G. J. Hutchings, J. Chem. Soc., Faraday Trans., 1997, 93, 2331
    DOI: 10.1039/A700803A

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