China High Quality 99.95% Cerium Dioxide CAS 1306-38-3 Powder

Cerium oxide is a key component of three-way catalysts (TWCs) for automotive exhaust systems. It utilizes its oxygen storage capacity to regulate oxygen concentration on the catalyst surface under both lean-burn and rich-burn conditions, thereby facilitating the conversion of carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). Furthermore, cerium oxide enhances the dispersion and thermal stability of precious metals (such as platinum and rhodium), extending the catalyst’s service life.

In solid oxide fuel cells (SOFCs), cerium oxide-based materials (such as doped ceria) are frequently employed as electrolytes. Due to its high oxygen-ion conductivity—particularly at intermediate temperatures (500–800°C)—cerium oxide enables lower operating temperatures while improving energy conversion efficiency and cell longevity.

In the glass industry, cerium oxide serves as a polishing agent, a decolorizer, and a UV absorber. As a polishing agent, it is characterized by rapid polishing rates and the ability to achieve high-quality surface finishes, making it widely used for optical glass and liquid crystal display (LCD) screens. As a decolorizer, it oxidizes ferrous ions (Fe²⁺) in the glass, thereby eliminating unwanted green tints. Additionally, cerium oxide absorbs ultraviolet radiation, offering protection for eyes and skin.

In recent years, cerium oxide has also demonstrated immense potential in emerging fields. In lithium-sulfur batteries, it can function as a cathode host material or a separator modification material; it effectively adsorbs polysulfides, suppresses the “shuttle effect,” and enhances cycling stability. In the biomedical sector, cerium oxide nanoparticles are utilized in drug delivery systems, biosensors, and disease therapies, owing to their antioxidant, anti-inflammatory, and radioprotective properties.

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