Study of the oxygen diffusion on three-way catalysts: a kinetic model

Arvaidas Galdikas (1) , Claude Descorme (2) , Daniel Duprez (2) , Fei Dong , Hirofumi Shinjoh

1 KTU - Kaunas University of Technology
2 LACCO - Laboratoire de catalyse en chimie organique

A computer model was developed to take into account all the phenomena that can occur in 18O/16O isotopic exchange over Pt/CeZrO x materials: adsorption/desorption on the metal, surface and bulk O diffusion. Discriminating each step of the exchange process is no longer necessary: kinetic parameters and O diffusivity can be calculated in a single experiment.

Mots clés: cerium–zirconium oxides; 18O/16O isotopic exchange; oxygen diffusion; oxygen storage capacity (OSC)

Domaines: Chimie théorique et/ou physique; Catalyse

Arvaidas Galdikas, Claude Descorme, Daniel Duprez, Fei Dong, Hirofumi Shinjoh. Study of the oxygen diffusion on three-way catalysts: a kinetic model. Topics in Catalysis, 2004, Proceedings of the 6th Congress on Catalysis and Automotive Pollution Control (CAPoC6), 30-31 (1-4), pp.405-409. ⟨10.1023/B:TOCA.0000029782.78561.47⟩. ⟨hal-00007460⟩