A study of catalysts derived from supported cobalt carbonyl clusters: Carbon monoxide hydrogenation and XPS analysis
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The clusters Co2(CO)8, CH3CCo3(CO)9, Co4(CO)12, or Co6(CO)152-, supported on γ-Al2O3, and Co4(CO)12 supported on dehydrated SiO2Al2O3, kieselguhr, Florisil, KOHγ-Al2O3, molecular sieve 5 Å, or untreated ZnO, serve as precursors to catalysts for the hydrogenation of carbon monoxide. For the various clusters on γ-Al2O3, the initial activity of the prepared catalyst decreases with increasing precursor stability, however, the turnover number and product selectivities are similar under batch conditions at 250 °C. For catalysts derived from supported Co4(CO)12, the initial activity decreases with increasing basicity of the support. The turnover numbers and selectivities for the catalysts derived from Co4(CO)12 are similar for all supports except SiO2Al2O3, which exhibits a significantly greater turnover number. The enhanced activity of the silicaalumina support correlates well with the amount of reduced cobalt on the surface as measured by X-ray photoelectron spectroscopy. Product selectivity towards C2C4 alkanes and alkenes is observed at lower reaction temperatures but at greatly diminished conversion. © 1987.
author list (cited authors)
Meyers, G. F., & Hall, M. B.