The oxygen storage capacity of Ce 0.2Zr 0.8O 2 solid solutions, prepared by different synthesis routes and aged at 1000°C, is investigated by means of temperature-programmed reduction, total- and dynamic-OSC measurements. The use of CO and H 2 as reducing agent is compared under dynamic conditions. It is observed that the dynamic OSC is critically dependent on sample pre-treatment and the nature of the reducing agent in the texturally unstable sample. In contrast, on a thermally stable Ce 0.2Zr 0.8O 2 only minor effects of the pre-treatment upon dynamic OSC are noticed.
Dependency of the oxygen storage capacity in zirconia-ceria solid solutions upon textural properties
KASPAR, JAN;DI MONTE, ROBERTA;FORNASIERO, Paolo;GRAZIANI, MAURO;
2001-01-01
Abstract
The oxygen storage capacity of Ce 0.2Zr 0.8O 2 solid solutions, prepared by different synthesis routes and aged at 1000°C, is investigated by means of temperature-programmed reduction, total- and dynamic-OSC measurements. The use of CO and H 2 as reducing agent is compared under dynamic conditions. It is observed that the dynamic OSC is critically dependent on sample pre-treatment and the nature of the reducing agent in the texturally unstable sample. In contrast, on a thermally stable Ce 0.2Zr 0.8O 2 only minor effects of the pre-treatment upon dynamic OSC are noticed.File in questo prodotto:
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