FeCo3O8
FeCo3O8 is a metastable, semiconducting transition metal oxide utilized in the development of advanced oxygen-evolution catalysts.
About FeCo3O8
FeCo3O8 is a complex oxide that functions as a semiconducting material within the broader category of oxygen-evolution catalysts. Its electronic structure is specifically tuned to facilitate the multi-step electron transfer processes required for efficient water splitting and related electrochemical reactions. As a metastable phase, this compound represents a unique structural arrangement of iron, cobalt, and oxygen. Its existence highlights the diversity of transition metal oxides that can be synthesized to optimize catalytic activity, offering a distinct pathway for researchers focused on sustainable energy conversion technologies.
Key Properties
Cross-validated computational properties for FeCo3O8, 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 FeCo3O8, 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. |
|---|---|---|---|---|---|
| P63mc (No. 186) | hexagonal | 0.00 | 0.0821 | -6.866 | 4.93 |
| P1 (No. 1) | triclinic | 0.19 | 0.1127 | -6.835 | 4.50 |
| R3m (No. 160) | trigonal | 0.00 | 0.1194 | -6.828 | 4.56 |
| P4332 (No. 212) | cubic | 0.25 | 0.1328 | -6.815 | 4.68 |
| R-3m (No. 166) | trigonal | 0.00 | 0.1444 | -6.803 | 4.36 |
| R3m (No. 160) | Trigonal | — | — | — | 4.56 |
| R3m (No. 160) | Trigonal | — | — | — | 4.83 |
| R3m (No. 160) | Trigonal | — | — | — | 4.69 |
| P63mc (No. 186) | Hexagonal | — | — | — | 4.93 |
| P63mc (No. 186) | Hexagonal | — | — | — | 5.41 |
| P63mc (No. 186) | Hexagonal | — | — | — | 5.34 |
| R-3m (No. 166) | Trigonal | — | — | — | 4.36 |
Applications
Where FeCo3O8 is used.
Frequently Asked Questions
Common questions about FeCo3O8, answered from cross-validated data.
What is FeCo3O8?
FeCo3O8 is a metastable, semiconducting transition metal oxide utilized in the development of advanced oxygen-evolution catalysts.
What is FeCo3O8 used for?
What is the band gap of FeCo3O8?
Is FeCo3O8 a metal, semiconductor, or insulator?
Is FeCo3O8 thermodynamically stable?
What is the crystal structure of FeCo3O8?
What is the density of FeCo3O8?
How many polymorphs of FeCo3O8 are known?
What elements does FeCo3O8 contain?
Where does the data for FeCo3O8 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the diverse family of oxide oxygen-evolution catalysts, FeCo3O8 occupies a specialized niche compared to more conventional materials like LiCoO2 or NiO. While many of its class members, such as LaMnO3 or BiFeO3, are characterized by their robust perovskite-type frameworks, FeCo3O8 exhibits a distinct metastable nature that differentiates its structural stability and catalytic surface behavior from these more standard, highly studied oxides.
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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