Fe2O6Se2
Fe2O6Se2 is a metastable semiconducting iron-based oxide used in the study of oxygen-evolution catalysis.
About Fe2O6Se2
Fe2O6Se2 is a semiconducting oxide that functions within the specialized class of oxygen-evolution catalysts. Its electronic structure and metastable nature make it a subject of interest for researchers looking to optimize catalytic performance in electrochemical systems.
As a material with multiple reported structural variations, it represents a complex phase space for iron-based selenites. Its utility is primarily focused on advancing the efficiency of oxygen-evolution reactions, where its semiconducting behavior plays a critical role in charge transfer processes.
Key Properties
Cross-validated computational properties for Fe2O6Se2, 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 Fe2O6Se2, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 0.68 | 0.0828 | -6.027 | 3.76 |
| P21/c (No. 14) | monoclinic | 0.32 | 0.0951 | -6.239 | 4.01 |
| I-42d (No. 122) | tetragonal | 0.00 | 0.1068 | -6.227 | 3.59 |
| — | — | — | — | — | 3.43 |
| — | — | — | — | — | 3.71 |
| — | — | — | — | — | 3.69 |
| — | — | — | — | — | 3.69 |
| — | — | — | — | — | 4.83 |
| No. 0 | unknown | — | — | — | 0.76 |
Applications
Where Fe2O6Se2 is used.
Frequently Asked Questions
Common questions about Fe2O6Se2, answered from cross-validated data.
What is Fe2O6Se2?
Fe2O6Se2 is a metastable semiconducting iron-based oxide used in the study of oxygen-evolution catalysis.
What is Fe2O6Se2 used for?
What is the band gap of Fe2O6Se2?
Is Fe2O6Se2 a metal, semiconductor, or insulator?
Is Fe2O6Se2 thermodynamically stable?
What is the crystal structure of Fe2O6Se2?
What is the density of Fe2O6Se2?
How many polymorphs of Fe2O6Se2 are known?
What elements does Fe2O6Se2 contain?
Where does the data for Fe2O6Se2 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the broader class of oxide catalysts, Fe2O6Se2 occupies a distinct niche compared to more traditional, highly stable transition metal oxides like NiO or perovskite-structured materials such as LaMnO3. While many of its class members are characterized by high thermodynamic stability, this compound is notable for its metastable state, offering a different pathway for catalytic activity that contrasts with the well-established electrochemical performance of lithium-based oxides like LiCoO2.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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