To provide a manufacturing method of a catalyst capable of controlling agglomeration of particles of a noble metal and a catalyst for cleaning exhaust gas.
The method comprises enlarging particles of a noble metal with -or-smaller particle sizes selectively by imparting reduction energy to the particles with a reducing agent to increase the minimum particle size of the particles to ≥1 nm. Since the procedure removes particles with a large mean migration length owing to enlargement of the particles and can thus increase the difference in the mean migration lengths of the particles of a noble metal associated with the distance between the particles and half melting, the particles are fixed to and supported in a substrate, and agglomeration of the particles can be controlled effectively.
WAKAMATSU HIRONORI
SUGA KATSUO
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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