1306-38-3 | Cerium Dioxide

Chemical type

• Metal oxide; reducible oxide catalyst support

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• Rare earth oxide
• Oxidized form of cerium compounds
• Cathodic inhibitor (in moderation)

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Key properties

• Fluorite crystal structure
• Reversible Ce⁴⁺/Ce³⁺ redox cycle
• Capable of forming oxygen vacancies
• Strong metal–support interaction with Ru

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• Forms at longer immersion times (e.g., 60 min) via oxidation of Ce(OH)₃ and Ce₂O₃
• Primarily contains Ce⁴⁺, leading to beige coating and increased thickness
• Insoluble and stable, but excess particles favor corrosion by increasing current demand
• Blocks reduction reactions but can accelerate corrosion in high concentrations

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• Redox activity with Ce³⁺/Ce⁴⁺ equilibrium
• High oxygen mobility and storage capacity
• Lattice distortion influences oxygen vacancy concentration
• Thermal stability
• Morphology-dependent (nanospheres, spindle-like, nanowires, cubes)

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• Catalyst support for Ru
• CO₂ activation via surface adsorption and formate/carbonate formation
• Promotes hydrogen spillover

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• Component in self-healing coatings on aluminum
• Protects metal surfaces in aggressive electrolytes
• In fuel cells, solar cells, and catalytic applications (beyond corrosion)

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• Catalyst for DMC synthesis from CO₂ and methanol
• CO₂ adsorption and activation
• Methanol activation to methoxy species
• Facilitates formation of key intermediates like CH₃OCOO

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Classification by use

• Chemicals used as catalyst supports
• Chemicals used in redox catalysis
• Chemicals used in CO₂ activation

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• Corrosion inhibitors for metals
• Oxidized inhibitors in protective layers
• Materials for catalytic and energy applications

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• Catalysts in CO₂ conversion reactions
• Materials for oxygen vacancy engineering
• Nanostructured materials in hydrothermal synthesis

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A trustworthy factory and manufacturer

1. [Cite:1] A dual promotional effect of doping tantalum (Ta) in atomically dispersed Ru/CeO2 catalyst toward CO2 methanation: Enhanced associative adsorption of CO2 and activation of H2, Applied Catalysis O: Open, Volume 209, December 2025, 207077
2. [Cite:2] Cerium Compounds Coating as a Single Self-Healing Layer for Corrosion Inhibition on Aluminum 3003, Sustainability, 2022, 14(22), 15056
3. [Cite:3] Effect of lattice distortion of CeO2 on direct synthesis of dimethyl carbonate from CO2 and methanol, Journal of Fuel Chemistry and Technology, Volume 53, Issue 11, November 2025, Pages 1590-1602