Influence of Final Nitriding Temperature on the Preparation and the Catalytic Performance of CoMoNx/CNTs for ammonia decomposition

A series of cobalt-molybdenum nitride catalysts were prepared using Co-Mo oxide precursors via temperature-programmed reaction in N-2-H-2 mixed gases. The catalysts were characterized by N-2 physical adsorption, X-ray diffraction, temperature-programmed desorption of H-2. Their catalytic performance was evaluated in the model reaction of ammonia decomposition. The influence of the final nitriding temperatures on the surface properties and the catalytic perfomance of CoMoNx/CNTs were described. The catalyst nitrided at 650 degrees C shows the best catalytic performance. The results indicated that a suitable final nitriding temperature contributes directly to the formation of nitrides and favor the catalyst activity