Multi-transition metal doped copper-cobalt spinel catalyst material for NOx decomposition

US11110432B2 · kind B2 · utility

Assignee

• TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC. · US

Inventors

• Torin C. Peck · Ypsilanti, US
• Ying Zhang · Salt Lake City, US
• Krishna Gunugunuri · Canton, US
• Charles A. Roberts · Farmington Hills, US
• Chen Ling · Sunnyvale, US

Key dates

• Filing date: Dec 9, 2019
• Grant date: Sep 7, 2021
• Expiry date: Feb 16, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2370/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Catalysts including multi-transition metal doped copper-cobalt spinel mixed oxide catalyst materials for direct NOx decomposition with selectivity to N2 from combustion engine exhaust, while minimizing formation of the N2O product. In one example, the catalyst may include a ternary zinc-doped copper-cobalt spinel material or a quaternary manganese+zinc doped copper-cobalt spinel material. The catalysts are effective for reducing NO to N2 at suitable temperatures of 350-500° C., with and without excess O2 presence.