Platinum oxidation catalyst and method for purifying exhaust gas using same

The present invention provides a platinum oxidation catalyst having excellent capacity for the oxidative purification of hydrocarbons (HC), in particular, among particulate components such as HCs, carbon monoxides (CO), nitrogen oxides (NOx), and soot in exhaust gas containing sulfur oxides exhausted from a lean combustion engine. Provided is a platinum oxidation catalyst for the oxidative purification of hydrocarbons from exhaust gas containing sulfur oxides and fine particulate components such as HCs, carbon monoxides (CO), nitrogen oxides (NOx), and soot exhausted from a lean combustion engine, wherein the platinum oxidation catalyst is characterized in that: the outer surface of a monolithic carrier is coated with a catalyst composition containing (A) a metallic oxide on which at least platinum (Pt) and a tungsten oxide are supported, and (B) a zeolite; and tungsten oxide particles having an aggregate particle diameter of 300 nm or less are present in the vicinity of the platinum (Pt) particles.