High surface area, bulk molybdenum nitride catalysts were synthesized via temperature programmed ammonalysis of ammonium hepta molybdate and citric acid (CA) composite. The sythesized materials were tested for COx free H 2 production via ammonia decomposition for fuel cell application. Cobalt was added in different loadings (1, 3, 5wt %) as a promoter for the bulk molybdenum nitrides. The chemical composition and surface morphology of nitride catalysts were studied by XRD, XPS, SEM-EDAX and TEM techniques. Addition of cobalt increased the formation of γ-Mo 2 N phase and cobalt existed as Co 3 Mo 3 N phase, which was uniformly distributed over Mo 2 N evidenced by TEM and SEM analysis.A drastic increase in Mo 2 N crystal size was observed when the Co loading exceeded 3 wt%, which in turn decreased the catalyst activity for ammonia decomposition reaction. All catalysts are exhibiting high activity than reported nitride catalysts at low temperatures. All catalysts showed stable activity for 30 hours. Activation energy calculated for ammonia decomposition was decreased drastically from 131.2 to 99kJ/mol by the addition of cobalt (1 wt%) in Mo 2 N prepartion.

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