Cr8O21
Cr8O21 is a metastable, semiconducting chromium oxide used in specialized catalytic research.
About Cr8O21
Cr8O21 is a semiconducting oxide that belongs to the broader family of spinel-related catalytic materials. Its electronic structure is characterized by semiconducting behavior, which influences its interaction with chemical species during surface reactions. Although it exists in a metastable state, this compound represents a specialized niche in oxide chemistry where structural flexibility can be leveraged for specific catalytic pathways.
This material is primarily investigated for its potential in oxidation-reduction processes where transition metal oxides are essential. Its existence as a metastable phase suggests that its synthesis and application are highly sensitive to processing conditions, making it a subject of interest for researchers seeking to tune catalytic activity through structural control.
Key Properties
Cross-validated computational properties for Cr8O21, 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.
Applications
Where Cr8O21 is used.
Frequently Asked Questions
Common questions about Cr8O21, answered from cross-validated data.
What is Cr8O21?
Cr8O21 is a metastable, semiconducting chromium oxide used in specialized catalytic research.
What is Cr8O21 used for?
What is the band gap of Cr8O21?
Is Cr8O21 a metal, semiconductor, or insulator?
Is Cr8O21 thermodynamically stable?
How many polymorphs of Cr8O21 are known?
What elements does Cr8O21 contain?
Where does the data for Cr8O21 come from?
How It Compares
Within the spinel oxide catalysts class.
Unlike the highly stable and widely utilized MgAl2O4 or the common binary oxides like NiO and ZnO, Cr8O21 occupies a more complex and metastable position within the spinel oxide class. While compounds like LaMnO3 or LaNiO3 are frequently studied for their robust perovskite-based catalytic performance, Cr8O21 offers a distinct alternative for systems requiring specific chromium-based redox centers that are not present in more conventional, thermodynamically stable spinel structures.
Related Compounds
Other Spinel Oxide Catalysts in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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