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

Authors :: Hickey, N.
Fornasiero, P.
Di Monte, R.
Kaspar, J.
Graziani, M.
Dolcetti, G.
Source :: Catalysis Letters; Mar2001, Vol. 72 Issue 1/2, p45-50, 6p
Publication Year :: 2001
Abstract: The effects of redox-ageing on the temperature-programmed reduction and dynamic oxygen storage were investigated on two samples of Ce<subscript>0.6</subscript>Zr<subscript>0.4</subscript>O<subscript>2</subscript> 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. [ABSTRACT FROM AUTHOR]

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