LAUSR

The formation and stability of an ammonia synthesis catalyst, based on cobalt molybdenum nitrides, were studied. The activation process of the catalyst was examined by in situ X-ray diffractometry. The thermal stability of obtained active phase of the catalyst was tested at 700 °C under ammonia atmosphere, N2/H2 mixture and under pure hydrogen. The presence of Co2Mo3N and Co3Mo3N phases in the catalyst was confirmed. The phase composition was stable in a long-term test performed under nitrogen/hydrogen atmosphere. Co3Mo3N phase decomposed into Co6Mo6N after exposure to pure hydrogen.