CoWO4
Cobalt tungstate · Cobalt(II) tungstate
CoWO4 is a stable semiconducting cobalt tungstate oxide utilized as a catalyst for oxygen-evolution reactions.
About Cobalt tungstate
CoWO4 is a semiconducting oxide that sits firmly on the thermodynamic convex hull, indicating high structural stability. As a member of the oxide oxygen-evolution catalyst family, it plays a vital role in electrochemical processes where efficient charge transfer and surface stability are paramount.
This compound is primarily investigated for its catalytic performance in water-splitting reactions. Its electronic character allows for effective interaction with reactive species, making it a subject of interest for researchers developing sustainable energy conversion technologies.
Key Properties
Cross-validated computational properties for Cobalt tungstate, aggregated across 2 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of CoWO4. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for CoWO4, 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. |
|---|---|---|---|---|---|
| — | — | 1.92 | 0.0000 | -2.102 | — |
| P2/c (No. 13) | monoclinic | 0.00 | 0.0000 | -8.566 | 7.42 |
| — | — | 2.08 | 0.0042 | -2.097 | — |
| Pc (No. 7) | monoclinic | 0.00 | 0.0559 | -16.614 | 8.11 |
| P2/c (No. 13) | monoclinic | 0.00 | 0.1447 | -1.766 | — |
| — | — | 0.74 | 0.1594 | -1.942 | — |
| P1 (No. 1) | triclinic | — | — | — | 7.67 |
| P2/c (No. 13) | monoclinic | — | — | — | — |
| P2/c (No. 13) | monoclinic | — | — | — | 7.75 |
Synthesis Routes
Literature-extracted synthesis procedures targeting CoWO4.
Applications
Where Cobalt tungstate is used.
Patent Landscape
1 patent reference CoWO4 or close compositional variants.
| Patent | Title | Assignee | Granted |
|---|---|---|---|
| 11879175 | W18O49/CoO/CoWO4/NF self-supporting electrocatalytic material and preparation method thereof | — | — |
Frequently Asked Questions
Common questions about Cobalt tungstate, answered from cross-validated data.
What is CoWO4?
CoWO4 is a stable semiconducting cobalt tungstate oxide utilized as a catalyst for oxygen-evolution reactions.
What is CoWO4 used for?
What is the band gap of CoWO4?
Is CoWO4 a metal, semiconductor, or insulator?
Is CoWO4 thermodynamically stable?
What is the crystal structure of CoWO4?
What is the density of CoWO4?
How many polymorphs of CoWO4 are known?
How is CoWO4 synthesized?
What elements does CoWO4 contain?
Where does the data for CoWO4 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Unlike the lithium-based intercalation oxides such as LiCoO2 or LiMn2O4, which are optimized for ion mobility in battery cathodes, CoWO4 is specialized for catalytic surface reactions. While it shares the oxide classification with materials like NiO and LaMnO3, its tungsten-based framework provides a distinct electronic environment that differentiates its catalytic mechanism from the transition-metal-only oxides in the group.
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- 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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