Put 25 g Nickel and 25 g Aluminium powdered in an 5 liter flask and add 500 ml Water. Add solid NaOH slowly (ca. 80 g) After all NaOH is added and no more Reaktion is observed heat in an waterbath at 70°C for 30 minutes. The Nickel will settle down to the ground. Remove the Water above. The katalysator ist wasched with the solvent used in the reaktion.