Zero-PGM Catalyst with Oxygen Storage Capacity for TWC Systems

• Main Authors: GOLDEN STEPHEN J, NAZARPOOR ZAHRA
• Format: Patent
• Language: English
• Published: 16.04.2015
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

ZPGM-ZRE catalyst system substantially free from platinum group (PGM) and rare earth (RE) metals for TWC application is disclosed. Disclosed ZPGM-ZRE catalyst system may include pure alumina as washcoat and a Cu-Mn stoichiometric spinel with Nb2O5-ZrO2 support oxide, as ZPGM-ZRE catalyst in overcoat. Disclosed ZPGM-ZRE catalyst systems are found to have high thermal stability, catalyst activity, and high oxygen storage capacity compared to commercial PGM catalyst system that includes Ce-based oxygen storage material (OSM).