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.
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3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| 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).
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Properties
editMo2N 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
editMolybdenum 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
editMolybdenum 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
edit- ^ 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.
- ^ 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.
- ^ "Original Synthesis of Molybdenum Nitrides". ACS Publications. doi:10.1021/acs.chemmater.0c01369. S2CID 219739192.
- ^ Kojima, Ryoichi; Aika, Ken-Ichi (2001). "Molybdenum nitride and carbide catalysts for ammonia synthesis". Applied Catalysis A: General. 219 (1–2): 141–147. doi:10.1016/S0926-860X(01)00676-7.