Dissociation of N2 is the rate determining step in ammonia synthesis, so all ammonia catalysts will do. Their operating temperatures are much below 600C.
Dear Andrzej Kotarba
Thanks
Could you please give me a bit more explanation and some specific name for the most commonly used catalysts in this regard.
Ruthenium, it is more active than Iron for ammonia synthesis.
I think also ammonia catalysts can do it but in a suitable condition .
Nitrogenases are enzymes used by some organisms to fix atmospheric nitrogen gas (N2), the reaction N≡N → 2 NH3.
I guess you are asking about N2 fixation (N2 + H2) but not dissociation N2 -> 2 N . Keep in mind that a catalyst does not change the reaction thermodynamics
Depends on your problem: i don't know much about, nitrogenase enzymes or heterogeneous catalyst, some homogeneous catalysts are from Schrock-Yandolov (Molybdenum), Nishibayshi (Molybdenum) and Peters (Iron), however they either involve specific chemicals, low temperatures and partially suffer from low Turn Over Numbers (TON)
http://onlinelibrary.wiley.com/doi/10.1002/anie.200705246/abstract;jsessionid=3E7707B8F77BFB80145895CE66407D3E.f03t03
http://pubs.acs.org/doi/abs/10.1021/ic500221n
http://pubs.acs.org/doi/abs/10.1021/ja4114962
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