Molybdenum nitride

Molybdenum nitride

Identifiers
CAS Number	12033-31-7  N
3D model (JSmol)	Interactive image
InChI InChI=1S/2Mo.N Key: CXDXWLBOICIIHQ-UHFFFAOYSA-N
SMILES [Mo].[Mo].[N]
Properties
Chemical formula	Mo2N
Molar mass	205.91 g·mol−1
Appearance	Gray solid
Density	9.06 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Molybdenum nitride (Mo₂N) is a binary inorganic compound composed of molybdenum and nitrogen. It belongs to the family of transition metal nitrides and exhibits properties that make it useful in applications such as a catalyst and a coating material.

Properties

Mo₂N typically exists in multiple crystalline forms, including hexagonal (hcp) and cubic (fcc) structures. ^[1] Its properties can vary depending on factors such as synthesis method, stoichiometry, and crystal structure. General properties of molybdenum nitride include:

• High melting point
• Good thermal stability
• High electrical conductivity
• Catalysis in various chemical reactions, including ammonia synthesis and hydrodeoxygenation reactions
• Mechanical hardness and wear resistance, making it suitable for coating applications

Synthesis

Molybdenum nitride can be synthesized through various methods, ^{[2] [3]} including:

• Direct nitridation: Molybdenum metal can react with nitrogen gas at elevated temperatures to form Mo₂N.
• Ammonolysis: Molybdenum precursors, such as molybdenum oxides or molybdates, can be treated with ammonia gas or ammonia-containing solutions to produce molybdenum nitride.
• Chemical vapor deposition: Molybdenum nitride thin films and coatings can be deposited onto substrates using CVD techniques, such as thermal CVD or plasma-enhanced CVD.

Applications

Molybdenum nitride is utilized as a catalyst in various industrial processes, including ammonia synthesis. Molybdenum nitride exhibits catalytic activity in the Haber-Bosch process for ammonia synthesis, where it serves as an alternative to conventional iron-based catalysts. ^[4]

References

1. Jauberteau, Isabelle; Bessaudou, Annie; Mayet, Richard; Cornette, Julie; Jauberteau, Jean Louis; Carles, Pierre; Merle-Méjean, Thérèse (December 2015). "Molybdenum Nitride Films". Coatings. 5 (4): 656–687. doi: 10.3390/coatings5040656 .
2. Lilić, Aleksandra; Cardenas, Luis; Mesbah, Adel; Bonjour, Erik; Jame, Patrick; Michel, Carine; Loridant, Stéphane; Perret, Noémie (30 November 2022). "Guidelines for the synthesis of molybdenum nitride: Understanding the mechanism and the control of crystallographic phase and nitrogen content". Journal of Alloys and Compounds. 924: 166576. doi:10.1016/j.jallcom.2022.166576. ISSN   0925-8388.
3. "Original Synthesis of Molybdenum Nitrides". ACS Publications. doi:10.1021/acs.chemmater.0c01369. S2CID   219739192.
4. Kojima, Ryoichi; Aika, Ken-Ichi (2001). "Molybdenum nitride and carbide catalysts for ammonia synthesis" . Applied Catalysis A: General. 219 (1–2): 141–147. Bibcode:2001AppCA.219..141K. doi:10.1016/S0926-860X(01)00676-7.