Exhaust gas purifying catalyst and manufacturing method thereof

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An exhaust gas purifying catalyst is composed of : noble metal particles; first compounds which support the noble metal particles and suppress movement of the noble metal particles; and second compounds which encapsulate the noble metal particles and the first compounds, suppress the movement of the noble metal particles, and suppress the coagulation of the first compounds following mutual contact of the first compounds. The first compounds are a composite containing a rare earth element and at least one of alkali metal and alkaline earth metal.