Catalyst powder, exhaust gas purifying catalyst, and method of producing the catalyst powder

摘要

A method of producing catalyst powder of the present invention has a step of precipitating any one of a noble metal particle ( 5 ) and a transition metal particle ( 10 ) in a reversed micelle ( 1 ); a step of precipitating, in the reversed micelle ( 1 ) in which any one of the noble metal particle ( 5 ) and the transition metal particle ( 10 ) is precipitated, a porous support material ( 7 ) which supports the noble metal particle ( 5 ) and the transition metal particle ( 10 ); and a step of precipitating the other of the noble metal particle ( 5 ) and the transition metal particle ( 10 ) in the reversed micelle ( 1 ) in which any one of the noble metal particle ( 5 ) and the transition metal particle ( 10 ) is precipitated. By this method, it is possible to obtain catalyst powder capable of maintaining initial purification performance thereof even if being exposed to the high temperature.