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A comparative study of oxygen storage capacity over Ce0.6Zr0.4O2 mixed oxides investigated by temperature-programmed reduction and dynamic OSC measurements

By HICKEY N., FORNASIERO P, DI MONTE R, KASPAR J, GRAZIANI M. and DOLCETTI G

Abstract

The effects ofredox-ageing on the temperature-programmed reduction and dynamic oxygen storage were investigated on two samples of Ce0.6Zr0.4O2 prepared under different synthesis conditions. It was observed that a high-temperature reduction/mild oxidation redox cycle can generate temperature-programmed reduction (TPR) profiles featuring a reduction peak at a temperature as low as 537 K. However, despite such favourable reduction behaviour, a strong deactivation of the oxygen storage is observed under dynamic conditions, indicating the limitations of the TPR method for investigation of oxygen storage

Topics: ceria, zirconia, car converters, oxygen storage capacity
Year: 2001
DOI identifier: 10.1023/A:1009096106758
OAI identifier: oai:arts.units.it:11368/1725435
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