Pb2Rh2
Pb2Rh2 is a thermodynamically stable metallic alloy composed of lead and rhodium that is studied for its catalytic properties.
About Pb2Rh2
Pb2Rh2 is a distinct metallic alloy belonging to the platinum-group catalyst family. Its position on the thermodynamic convex hull confirms its stability, making it a robust candidate for research into complex intermetallic systems. The compound is characterized by its metallic electronic nature, which is a hallmark of its potential utility in catalytic processes where electron transfer is critical. Its structural complexity is underscored by its presence across multiple material databases, reflecting significant interest in its atomic arrangement and potential for specialized chemical applications. This material serves as a vital component in the ongoing exploration of rhodium-based alloys, offering unique pathways for surface-mediated reactions. By leveraging the interplay between lead and rhodium, researchers can investigate how these metallic structures influence catalytic efficiency and selectivity in demanding chemical environments.
Key Properties
Cross-validated computational properties for Pb2Rh2, aggregated across 5 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 Pb2Rh2, 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. |
|---|---|---|---|---|---|
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0000 | -40.347 | 12.23 |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P-3m1 (No. 164) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 1.95 |
| P21/m (No. 11) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
Applications
Where Pb2Rh2 is used.
Frequently Asked Questions
Common questions about Pb2Rh2, answered from cross-validated data.
What is Pb2Rh2?
Pb2Rh2 is a thermodynamically stable metallic alloy composed of lead and rhodium that is studied for its catalytic properties.
What is Pb2Rh2 used for?
What is the band gap of Pb2Rh2?
Is Pb2Rh2 a metal, semiconductor, or insulator?
Is Pb2Rh2 thermodynamically stable?
What is the crystal structure of Pb2Rh2?
What is the density of Pb2Rh2?
How many polymorphs of Pb2Rh2 are known?
What elements does Pb2Rh2 contain?
Where does the data for Pb2Rh2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the broader class of platinum-group alloy catalysts, Pb2Rh2 stands out for its specific thermodynamic stability compared to more complex or less stable counterparts like Ga2Ru or As2Ir. While siblings such as LaRh focus on different rare-earth interactions, Pb2Rh2 utilizes the heavy-metal characteristics of lead to modify the catalytic behavior of the rhodium framework, distinguishing it from simpler binary systems like BaPd.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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