Oxygen storage and mobility on model three-way catalysts

D. Duprez , C. Descorme (1) , T. Birchem , E. Rohart

1 CARE - IRCELYON-Catalytic and Atmospheric Reactivity for the Environment

Oxygen storage capacity (OSC) of TW catalysts has a strong impact on their performances under oscillatory conditions. This paper reviews the different methods developed for OSC measurements, the effects of catalyst composition on OSC as well as the impact of OSC on TW catalysis, concentrating on the results obtained in our laboratory. Use of OSC measurements for catalysts control (on-board diagnostic) is also examined. The role of superoxide species as intermediates in the oxygen storage process will be emphasized. Finally, we shall review the recent developments on CeZr-based oxides.

Domaines: Catalyse; Environnement et Société

D. Duprez, C. Descorme, T. Birchem, E. Rohart. Oxygen storage and mobility on model three-way catalysts. Topics in Catalysis, 2001, 16 (1-4), pp.49-56. ⟨10.1023/a:1016622612521⟩. ⟨hal-01400713⟩