The Denitridation of Nitrides of Iron, Cobalt and Rhenium Under Hydrogen

The denitridation behaviour of binary iron, cobalt and rehnium nitrides under H-2 /Ar has been investigated. The iron nitride was found to lose over 70 % of its as prepared nitrogen content at 400 A degrees C. The cobalt nitride was completely denitrided at 250 A degrees C. Rhenium nitride lost close to 90 % of its nitrogen at 350 A degrees C. In addition, Co-Re-4 prepared by ammonolyis was investigated, whilst only traces of NH3 were lost from this material under H-2/Ar at 400 A degrees C, with H-2/N-2 it proved to be an active ambient pressure ammonia synthesis catalyst in accordance with previous literature.