Ruthenium(IV) oxide
（重定向自RuO2）
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Ruthenium(IV) oxide is the inorganic compound with the formula RuO2. This black solid is the most common oxide of ruthenium. It is widely used as an electrocatalyst for producing chlorine, chlorine oxides, and O2 catalyst is ruthenium(IV) oxide. Like many dioxides, RuO2 adopts the rutile structure.