System and methods for using synergized PGM as a three-way catalyst

摘要

Synergies resulting from combinations of catalyst systems including Copper-Manganese material compositions and PGM catalysts are disclosed. Variations of catalyst system configurations are tested to determine most effective material composition, formulation, and configuration for an optimal synergized PGM (SPGM) catalyst system. The synergistic effect of the selected SPGM catalyst system is determined under steady state and oscillating test conditions, from which the optimal NO/CO cross over R-value indicates enhanced catalytic behavior of the selected SPGM catalyst system as compared with current PGM catalysts for TWC applications. According to principles in the present disclosure, application of Pd on alumina-based support as overcoat and Cu—Mn spinel structure supported on Nb2O5—ZrO2 as washcoat on suitable ceramic substrate, produce higher catalytic activity, efficiency, and better performance in TWC condition, especially under lean condition, than commercial PGM catalysts.

主权项

1. A catalyst system, comprising:
at least one substrate; at least one washcoat comprising at least one oxygen storage material further comprising Cu—Mn spinel having a niobium-zirconia support oxide; and at least one overcoat comprising at least one platinum group metal catalyst and Al2O3.