Method for producing ammonia synthesis catalyst and a catalyst obtained by this method

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PROBLEM TO BE SOLVED : To provide a production method of ammonia synthesis catalyst capable of safely removing functional groups in activated carbon and producing an ammonia synthesis catalyst without requiring facilities, which ensure safety, and a worker for monitoring as the causes of the increase of catalyst production cost. SOLUTION : When a noble metal and an alkali metal, an alkaline earth metal or a rare earth metal are carried on activated carbon to obtain an ammonia synthesis catalyst, the activated carbon is alkali-treated before the carrying. The alkali treatment is preferably carried out by immersing dried activated carbon in an aqueous solution of an alkali metal hydroxide such as KOH or NaOH or in an aqueous solution of an alkaline earth metal hydroxide such as Ca(OH)2 or Mg(OH)2. The immersion time depends on the concentration and temperature of the aqueous solution and it is usually 1-24 hr.