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We report the preparation of supported cobalt catalysts (9wt% Co) on untreated (CNT) and surface-oxidized (CNT-ox) carbon nanotube materials by incipient wetness impregnation with solutions of cobalt nitrate in water, ethanol, or 1-propanol. The results show that by a judicious selection of solvent and drying method, similar cobalt oxide particle sizes in the range of 4–5nm on CNT and CNT-ox materials...