CoPt2
CoPt2 is a metallic cobalt-platinum alloy studied primarily for its potential applications in catalytic processes.
About CoPt2
CoPt2 is a metallic alloy composed of cobalt and platinum. As a member of the platinum-group alloy catalyst class, it is characterized by its conductive electronic nature and significant structural complexity, evidenced by its presence across multiple material databases. While it is currently classified as thermodynamically unstable relative to the ground state, its structural variety suggests potential for metastable phases. This makes it an intriguing subject for researchers investigating the influence of composition on catalytic activity and phase stability.
Key Properties
Cross-validated computational properties for CoPt2, aggregated across 4 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for CoPt2, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| Pa-3 (No. 205) | cubic | 0.00 | 0.6180 | -5.863 | 15.19 |
| — | — | — | — | — | 15.36 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 16.02 |
| Cm (No. 8) | Monoclinic | — | — | — | 13.55 |
| Amm2 (No. 38) | Orthorhombic | — | — | — | 15.30 |
| P-6m2 (No. 187) | Hexagonal | — | — | — | 15.17 |
| P-1 (No. 2) | Triclinic | — | — | — | 12.90 |
| C2/m (No. 12) | Monoclinic | — | — | — | 16.42 |
| P1 (No. 1) | Triclinic | — | — | — | 18.72 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 14.39 |
| C2 (No. 5) | Monoclinic | — | — | — | 16.86 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 14.90 |
Applications
Where CoPt2 is used.
Frequently Asked Questions
Common questions about CoPt2, answered from cross-validated data.
What is CoPt2?
CoPt2 is a metallic cobalt-platinum alloy studied primarily for its potential applications in catalytic processes.
What is CoPt2 used for?
What is the band gap of CoPt2?
Is CoPt2 a metal, semiconductor, or insulator?
Is CoPt2 thermodynamically stable?
What is the crystal structure of CoPt2?
What is the density of CoPt2?
How many polymorphs of CoPt2 are known?
What elements does CoPt2 contain?
Where does the data for CoPt2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Unlike more stable or common platinum-group intermetallics such as P3Ru or As2Pt, CoPt2 exists in a metastable state above the hull, placing it in a distinct category of experimental materials that require precise synthesis conditions to access compared to its more robust class counterparts.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- mpaloe — Data from mpaloe.
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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