Co-free LaFePdO3 perovskite catalyst with the self-regenerative function of Pd was
developed. This technology was named the “intelligent catalyst”. Suppression capacity for Pd
particle growth and catalytic activity of the Co-free perovskite LaFePdO3 were compared with those
of LaFeCoPdO3. It was confirmed that Pd particles on LaFePdO3 maintained a nano-particle size by
the results of XAFS analysis and TEM observation after aging in engine exhaust gas at 900 °C, and
LaFePdO3 demonstrated an excellent light-off performance. Further, the design configuration for
LaFePdO3 in the washcoat was investigated to maximize the self-regenerative function under
practical conditions.