V3CoO8
V3CoO8 is a metastable semiconducting oxide containing cobalt and vanadium that is investigated for its potential as an oxygen-evolution catalyst.
About V3CoO8
V3CoO8 is a complex ternary oxide composed of cobalt, vanadium, and oxygen. As a semiconducting material, it functions within the broader class of oxygen-evolution catalysts, where its electronic structure plays a critical role in facilitating electrochemical reactions.
This material is characterized as metastable, reflecting a delicate balance in its atomic arrangement. Its presence in multiple structural databases highlights its significance as an object of study for researchers aiming to understand the relationship between composition and catalytic performance in transition metal oxides.
Key Properties
Cross-validated computational properties for V3CoO8, aggregated across 3 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 V3CoO8, 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. |
|---|---|---|---|---|---|
| Iba2 (No. 45) | orthorhombic | 1.85 | 0.0379 | -8.373 | 3.64 |
| P1 (No. 1) | triclinic | 0.00 | 0.0737 | -8.337 | 2.46 |
| Cm (No. 8) | monoclinic | 0.00 | 0.0799 | -8.331 | 3.90 |
| P21 (No. 4) | monoclinic | 0.00 | 0.1156 | -8.296 | 3.89 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.90 |
| P1 (No. 1) | Triclinic | — | — | — | 2.68 |
| P1 (No. 1) | Triclinic | — | — | — | 2.46 |
| P1 (No. 1) | Triclinic | — | — | — | 2.54 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.07 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.38 |
| Cm (No. 8) | — | — | — | — | — |
Applications
Where V3CoO8 is used.
Frequently Asked Questions
Common questions about V3CoO8, answered from cross-validated data.
What is V3CoO8?
V3CoO8 is a metastable semiconducting oxide containing cobalt and vanadium that is investigated for its potential as an oxygen-evolution catalyst.
What is V3CoO8 used for?
What is the band gap of V3CoO8?
Is V3CoO8 a metal, semiconductor, or insulator?
Is V3CoO8 thermodynamically stable?
What is the crystal structure of V3CoO8?
What is the density of V3CoO8?
How many polymorphs of V3CoO8 are known?
What elements does V3CoO8 contain?
Where does the data for V3CoO8 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the diverse family of oxygen-evolution catalysts, V3CoO8 occupies a distinct niche compared to more conventional materials like LiCoO2 or LaMnO3. While many of its class members are highly stable, well-characterized perovskites or layered oxides, V3CoO8 represents a more complex, metastable phase that offers a different pathway for surface reactivity and charge transport in catalytic applications.
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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