Towards the comprehension of oxygen storage processes on model three-way catalysts |
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| Authors: | Sumeya Bedrane Claude Descorme and Daniel Duprez |
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| Affiliation: | Laboratoire de Catalyse en Chimie Organique (LACCO), UMR CNRS 6503, Université de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France |
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| Abstract: | CeO2- and Ce0.63Zr0.37O2-supported noble metal catalysts were studied. Samples were fully characterized using TEM, XRD, N2 adsorption and H2 chemisorption. The oxygen storage process was investigated focusing on the evolution as a function of temperature of both the oxygen storage capacity (OSC) and the oxygen storage complete capacity (OSCC). Aging effect on OSC was also examined in details in the case of Rh catalysts. Finally, the major role of oxygen diffusion, partly influenced by the metal/support interface quality, was confirmed. |
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| Keywords: | Three-way catalysts Oxygen storage capacity Oxygen storage complete capacity |
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