Metal oxide particle, production process thereof and exhaust gas purifying catalyst

摘要

The present invention provides a metal oxide having a combination of multiple properties useful in the production of an exhaust gas purifying catalyst, a production process thereof, and an exhaust gas purifying catalyst for purifying the components in an exhaust gas. The metal oxide particle of the present invention comprises a core part 1 relatively rich in a ceria-zirconia solid solution and a surface layer 2 relatively rich in a second metal oxide such as ceria or zirconia.