Inorganic fiber catalyst for PM oxidation combustion in exhaust gas, production method thereof, and catalyst structure for PM oxidation combustion in exhaust gas

摘要

An inorganic fiber catalyst includes an alumina-silica fiber base material, and a plurality of catalyst component particles contained in the alumina-silica fiber base material. A mean particle diameter of the catalyst component particles contained in at least a surface portion of the alumina-silica fiber base material is 50 nm or less, and a standard deviation of particle diameters of the catalyst component particles is 30 or less.