PGM AND COPPER-MANGANESE IN THREE WAY CATALYST SYSTEMS

摘要

Synergized Platinum Group Metals (SPGM) catalyst systems for TWC application are disclosed. Disclosed SPGM catalyst systems may include a washcoat with a Cu-Mn spinel structure, Cu1.0Mn2.0O4, supported on Nb2O5-ZrO2 and an overcoat that includes PGM supported on carrier material oxides, such as alumina. SPGM catalyst system that includes the spinel structure of Cu1.0Mn2.0O4 show significant improvement in nitrogen oxide reduction performance under stoichiometric operating conditions and especially under lean operating conditions, which allows a reduced consumption of fuel. Additionally, disclosed SPGM catalyst system with spinel structure of Cu1.0Mn2.0O4also enhances the reduction of carbon monoxide and hydrocarbon within catalytic converters.