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Cerium(III) oxide, also known as cerium oxide, cerium trioxide, cerium sesquioxide, cerous oxide or dicerium trioxide, is an oxide of the rare-earth metal cerium. It has chemical formula Ce 2 O 3 and is gold-yellow in color.
Cerium(IV) oxide ("ceria") has the fluorite structure, similarly to the dioxides of praseodymium and terbium. Ceria is a nonstoichiometric compound, meaning that the real formula is CeO 2-x, where x is about 0.2. Thus, the material is not perfectly described as Ce(IV). Ceria reduces to cerium(III) oxide with hydrogen gas. [3]
Cerium(IV) oxide ("ceria") has the fluorite structure, similarly to the dioxides of praseodymium and terbium. Ceria is a nonstoichiometric compound, meaning that the real formula is CeO 2−x, where x is about 0.2. Thus, the material is not perfectly described as Ce(IV). Ceria reduces to cerium(III) oxide with hydrogen gas. [25]
The main disadvantage of the stoichiometric ceria cycle lies in the fact that the reduction reaction temperature of cerium(IV) oxide is at the same range of the melting temperature (1,687–2,230 °C) of cerium(IV) oxide (), [5] which in the end results in some melting and sublimation of the material, which can produce reactor failures such as ...
Cerium oxide may refer to: Cerium(III) oxide, Ce 2 O 3, also known as dicerium trioxide; Cerium(III, IV) oxide, Ce 3 O 4 (dark blue) Cerium(IV) oxide, CeO 2, also ...
As such, cerium oxide is a material of interest for solid oxide fuel cells (SOFCs) in comparison to zirconium oxide. [29] Thermochemically, the cerium(IV) oxide–cerium(III) oxide cycle or CeO 2 /Ce 2 O 3 cycle is a two-step water splitting process that has been used for hydrogen production. [30]
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Cerium nitrate hexahydrate, with the formula Ce(NO 3) 3.6H 2 O (CAS number 10294-41-4) is the most common nitrate of cerium(III). It is a component in a burn treatment cream that also includes silver sulphadiazine. Concentrations used are 0.5 M for the cerium nitrate. For very serious burns it reduces the death rate.
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