The effect of precursors of Co/γ-Al2O3 catalysts prepared from Co(NO3)2 and (CO)6Co2CC(COOH)2 on the Fischer-Tropsch synthesis (FTS) catalytic performance were investigated. All catalysts were characterised by TGA, BET, pore size distribution analysis and TEM techniques. For Aluminium-supported catalyst, the use of cobalt carbonyl cluster as cobalt precursor resulted in a higher activity and C5+ selectivities compared with the reference catalyst prepared from nitrate at low reaction temperature. The activities can be correlated with the zero valent cobalt metal exist on the support. The chain growth attribute to well dispersed smaller metallic cobalt particles resulted from the partial removal of terminal carbonyls at 150°C.
A new heteronuclear Ln-Co carbonyl cluster, Ce4Yb2(μ3-L)4(CF3COO)8(DMF)6Co (L=(CO)6Co2CC(COO)2-), has been synthesized by reaction of (CO)6Co2CC(COOH)2 with Ce (OOCCF3)32H2O and Yb (OOCCF3)32H2O. The cluster structure was characterized by single-crystal X-ray diffraction and IR. The crystal is monoclinic crystal system and C2/c space group. X-ray analysis revealed that the heterometallic cluster belonged to a rare class of Ln-Co carbonyl cluster bridged by carboxylate groups of carbonyl cluster ligands. The cluster was monometric unit and exhibited cage-like configuration.
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