What is a Cerium(IV) oxide (CeO₂)?

Cerium(IV) oxide (CeO₂) is an inorganic compound composed of cerium (Ce) and oxygen (O), with cerium having a +4 oxidation state. It appears as a white powder and is used in a wide range of industrial applications due to its unique properties. One of the most significant uses of CeO₂ is as a catalyst. In automotive catalytic converters, cerium oxide plays a vital role in reducing harmful emissions, such as carbon monoxide and nitrogen oxides, by facilitating redox reactions. This makes CeO₂ a key component in three-way catalysts, widely used in environmental protection technologies.

Additionally, CeO₂ is used in refractory materials and polishing compounds. In ceramics and glass manufacturing, it enhances optical properties and heat resistance. Cerium oxide is used in special glass formulations to improve thermal stability and wear resistance. Furthermore, due to its high redox potential, CeO₂ is being investigated for energy applications, such as fuel cells and hydrogen storage technologies. It can facilitate redox reactions between hydrogen and oxygen, potentially contributing to energy efficiency improvements. Thus, cerium oxide is an important material in various fields, especially in environmental protection and energy efficiency, and its demand is expected to increase in the future.

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