TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Processes: The temperature of the decomposition is 275-475 degrees C. The gaseous pressure of decomposition is greater than 2000 (preferably 2000-3000) psig. The decomposition occurs under the gaseous pressure of hydrogen (H2). Preferred Components: The MoS2 catalyst has total carbon monoxide (CO) conversion in synthesis gas methanation of greater than 75%. The MoS2 catalyst is formed by decomposition of ammonium tetrathiomolybdate in an organic solvent in presence of a solution.    TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The promoter comprises metal(s) and element(s) from group 16. The promoter comprises at least one group 4 metal and at least one element from group 16, preferably zirconium and elemental sulfur.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent is water (H2O). EXAMPLE - A molybdenum disulfide (MoS2) catalyst was prepared by decomposition of ammonium tetrathiomolybdate in organic solvent e.g. tridecane in presence of solvent of water and dimethyl disulfide. A 500 mL autoclave was loaded with catalyst precursor ammonium tetrathiomolybdate (4 mg), organic solvent of n-tridecane (60 g) and water (50 g). The molybdenum (Mo) catalyst was modified with zirconium promoter by adding zirconyl hydrate nitrate (1.776 g). A dimethyl disulfide (1 g) was added to prevent hydrogen from stripping all sulfur from MoS2 catalyst. Elemental sulfur (1.538 g) was added for catalyst stability. The sealed reactor was purged with hydrogen (H2) and pressurized with 150 psi ft at room temperature. Reactor contents were stirred and heated to 375 degrees C. After achieving 375 degrees C, the final pressure obtained was 2500 psig. Reactor contents were kept at 375 degrees C and 2500 psig for 1 hour. After 1 hour, the reactor was cooled and water vapor, hydrogen sulfide and ammonia gases generated from ammonium tetrathiomolybdate decomposition were removed from reactor by venting. The resultant MoS2 catalyst was collected, dried and tested.