Co2Fe4O8
Co2Fe4O8 is a semiconducting mixed-metal oxide catalyst designed for use in electrochemical oxygen-evolution processes.
About Co2Fe4O8
Co2Fe4O8 is a semiconducting mixed-metal oxide that belongs to the class of oxygen-evolution catalysts. Its electronic structure and composition make it a subject of interest for researchers seeking efficient, earth-abundant alternatives for water-splitting technologies.
As a near-hull stable compound, it is considered highly likely to be synthesizable in a laboratory setting. With multiple reported structures across various databases, it represents a well-characterized material within the broader landscape of transition metal oxides used in energy conversion.
Key Properties
Cross-validated computational properties for Co2Fe4O8, aggregated across 1 database.
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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Co2Fe4O8. Tight agreement means computed properties can be trusted without re-running calculations.
Only 1 independent DFT source (materials_project) reports a hull energy for Co2Fe4O8, so cross-source agreement can't be assessed yet.
Reported Structures
Lowest-energy structures reported for Co2Fe4O8, 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. |
|---|---|---|---|---|---|
| Fd-3m (No. 227) | cubic | 1.55 | 0.0102 | -7.839 | 5.17 |
| Imma (No. 74) | orthorhombic | 1.23 | 0.0554 | -7.794 | 5.30 |
| C2 (No. 5) | monoclinic | 1.10 | 0.0723 | -7.777 | 5.15 |
| Cm (No. 8) | monoclinic | 0.61 | 0.0746 | -7.775 | 5.03 |
| Cm (No. 8) | monoclinic | 0.54 | 0.0802 | -7.769 | 5.02 |
| P3121 (No. 152) | trigonal | 0.66 | 0.1218 | -7.727 | 5.02 |
| I41/amd (No. 141) | tetragonal | 1.39 | 0.5001 | -7.349 | 5.30 |
| Fd-3m (No. 227) | cubic | 0.00 | — | -5.520 | 5.92 |
| Fd-3m (No. 227) | cubic | 0.00 | — | -6.173 | 5.47 |
| Fd-3m (No. 227) | cubic | — | — | -7.388 | 5.37 |
| R-3m (No. 166) | trigonal | — | — | — | 5.27 |
| Fd-3m (No. 227) | cubic | — | — | — | 5.30 |
Synthesis Routes
Literature-extracted synthesis procedures targeting Co2Fe4O8.
Applications
Where Co2Fe4O8 is used.
Frequently Asked Questions
Common questions about Co2Fe4O8, answered from cross-validated data.
What is Co2Fe4O8?
Co2Fe4O8 is a semiconducting mixed-metal oxide catalyst designed for use in electrochemical oxygen-evolution processes.
What is Co2Fe4O8 used for?
What is the band gap of Co2Fe4O8?
Is Co2Fe4O8 a metal, semiconductor, or insulator?
What is the crystal structure of Co2Fe4O8?
What is the density of Co2Fe4O8?
How many polymorphs of Co2Fe4O8 are known?
How is Co2Fe4O8 synthesized?
What elements does Co2Fe4O8 contain?
Where does the data for Co2Fe4O8 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Compared to well-known battery cathode materials like LiCoO2 and LiMn2O4, Co2Fe4O8 is specifically optimized for catalytic performance rather than ion intercalation. While perovskite-structured members like LaMnO3 and LaNiO3 are frequently studied for their high conductivity, Co2Fe4O8 offers a distinct metal-oxide framework that balances stability with the necessary electronic properties to drive oxygen-evolution reactions.
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- aflow — Data from AFLOW (aflow.org). Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012). (CC-BY-4.0)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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