About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Discovery and Design of Materials
|
| Presentation Title |
Prediction and Screening of Transition Metal Nitrides for Ammonia Synthesis |
| Author(s) |
Luka Mikek, Dallas R Trinkle |
| On-Site Speaker (Planned) |
Luka Mikek |
| Abstract Scope |
Synthesis of ammonia is of critical importance to applications in energy, industrial chemistry, and especially agriculture. Today, this synthesis is accomplished industrially using the energy-intensive Haber-Bosch process. Transition metal nitrides hold promise for a more energy-efficient synthesis in which the nitride material itself can be depleted and regenerated cyclically to act as the nitrogen source. In this study, we present a first-principles exploration of Co3Mo3N, an η-carbide-type nitride that has shown promise for this application. We examine the defect energies and phase stability over a broad range of relevant nitrogen stoichiometries in Co3Mo3N and use the results to develop screening criteria. We then apply these criteria to screen a broad range of other similar nitrides, both known and novel, using density functional theory. We identify several other materials, including Co3W3N, Mo3Co2FeN, and W3Co2FeN, as promising candidates for ammonia synthesis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, |