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Ligated dicobalt (III) heptamolybdate (CoL 6 ) 2 (Mo 7 O 24 ) multitransition-metal complex was prepared. This complex was deposited evenly on nano γ-alumina catalyst support. The partial reduction of cobalt (III)/ molybdate pre-catalyst was performed in a batch reactor with hydrogen gas at a pressure of 20 bars and temperature of 873 o K for 5 hours. The catalyst was characterized using FTIR, XRD, BET and TEM. The nano cobalt (III)/molybdenum catalyst was employed for hydrogenation reaction of carbon monoxide and carbon dioxide. The assessment of the catalyst was carried out at different temperature over a pressure range of 10-50 bars with various H 2 /CO ratios. This catalyst was found to be active, and stable for usage at high temperature and moderate pressure. The catalyst gave an excellent conversion of carbon monoxide to hydrocarbons (95%); it also converted 78% of carbon dioxide to carbon monoxide (73) and methane (5%). TEM image demonstrated catalyst has nearly spherical morphology with the average particle size of 46.86 nm. Keywords : complex, carbon monoxide, Carbon dioxide, multitransition-metal, surface modified nano catalyst

Hydrogenation of Carbon Monoxide and Carbon Dioxide over Nano γ-Alumina Supported Cobalt (III)/Molybdenum Catalyst