Sr2CoO4
Sr2CoO4 is a stable semiconducting oxide material primarily utilized in the study and development of oxygen-evolution catalysts for electrochemical applications.
About Sr2CoO4
Sr2CoO4 is a semiconducting oxide that sits firmly on the thermodynamic convex hull, indicating high structural stability. As a member of the oxygen-evolution catalyst class, it provides a robust framework for investigating electron transfer processes during electrochemical water splitting.
This material is highly regarded in materials informatics due to its significant structural diversity, with numerous reported configurations across major databases. Its electronic properties make it a compelling candidate for researchers seeking to optimize catalytic activity in renewable energy conversion systems.
Key Properties
Cross-validated computational properties for Sr2CoO4, 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 Sr2CoO4, 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. |
|---|---|---|---|---|---|
| C2/m (No. 12) | monoclinic | 0.77 | 0.0000 | -6.678 | 5.25 |
| Cmce (No. 64) | orthorhombic | 0.00 | 0.0001 | -11.926 | 5.52 |
| Cmce (No. 64) | orthorhombic | 0.50 | 0.0010 | -11.925 | 5.42 |
| P21 (No. 4) | monoclinic | 0.05 | 0.0036 | -6.674 | 5.23 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0072 | -6.671 | 5.23 |
| Ima2 (No. 46) | orthorhombic | 0.35 | 0.0086 | -11.918 | 5.50 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0088 | -6.669 | 5.22 |
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0112 | -6.667 | 5.55 |
| Pmmn (No. 59) | orthorhombic | 0.00 | 0.0182 | -6.660 | 5.23 |
| P1 (No. 1) | triclinic | 0.02 | 0.0289 | -6.649 | 5.22 |
| Pmmn (No. 59) | orthorhombic | 0.00 | 0.0473 | -6.631 | 5.22 |
| Immm (No. 71) | orthorhombic | 0.00 | 0.0710 | -6.607 | 5.33 |
Applications
Where Sr2CoO4 is used.
Frequently Asked Questions
Common questions about Sr2CoO4, answered from cross-validated data.
What is Sr2CoO4?
Sr2CoO4 is a stable semiconducting oxide material primarily utilized in the study and development of oxygen-evolution catalysts for electrochemical applications.
What is Sr2CoO4 used for?
What is the band gap of Sr2CoO4?
Is Sr2CoO4 a metal, semiconductor, or insulator?
Is Sr2CoO4 thermodynamically stable?
What is the crystal structure of Sr2CoO4?
What is the density of Sr2CoO4?
How many polymorphs of Sr2CoO4 are known?
What elements does Sr2CoO4 contain?
Where does the data for Sr2CoO4 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the diverse landscape of oxide catalysts, Sr2CoO4 occupies a distinct niche compared to perovskite-related siblings like La2NiO4 or LaMnO3. While many members of this class are optimized for specific battery or fuel cell applications, Sr2CoO4 is distinguished by its unique cobalt-based coordination environment which offers a different electronic pathway for oxygen evolution compared to the nickel- or manganese-based alternatives.
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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