 Cobalt @-@ based catalysts are used in reactions involving carbon monoxide . Steam reforming , useful in hydrogen production , uses cobalt oxide @-@ base catalysts . Cobalt is also a catalyst in the Fischer – Tropsch process for the hydrogenation of carbon monoxide into liquid fuels . <unk> of alkenes often uses cobalt <unk> as a catalyst , although it is often replaced by more efficient <unk> and rhodium @-@ based catalysts , e.g. the Cativa process . 
