Oxygen Storage Capacity: Ceria-Zirconia

This lecture covers the concept of Oxygen Storage Capacity (OSC) in ceria-zirconia catalysts, focusing on the reversible oxygen uptake and release. It explains the role of ceria in undergoing rapid oxidation state changes and the addition/removal of oxygen. The lecture delves into the use of ceria-zirconia in Three-Way Catalysts (TWC) for emission control, discussing the impact of thermal aging on OSC and the stabilization effect of zirconia. Various techniques such as pulse injection and step gas concentration switches are explored to measure OSC and dynamic OSC. The lecture also touches upon the importance of crystal structure, particle size, and synthesis methods in enhancing OSC performance.