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Automotive Engineering Commons

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Catalysis and Reaction Engineering

1997

Articles 1 - 1 of 1

Full-Text Articles in Automotive Engineering

Ultra-Thin Ceo2 Overlayer On Ysz Studied By X-Ray Surface Scattering, Wotjek Dmowski, S. Putna, Raymond J. Gorte, John M. Vohs, T. Egami Jan 1997

Ultra-Thin Ceo2 Overlayer On Ysz Studied By X-Ray Surface Scattering, Wotjek Dmowski, S. Putna, Raymond J. Gorte, John M. Vohs, T. Egami

Departmental Papers (CBE)

Transition metal catalysts such as Rh/Pt used in a three-way automotive catalytic converter have to perform reduction and oxidation functions at the same time. This can be accomplished only in a specific range of oxygen pressure and temperature. In order to maintain a constant partial pressure of oxygen in the vicinity of catalysts mixtures of ceria and zirconia are used. Ceria is an essential component due to its capability of storing oxygen under oxidizing and releasing oxygen under reducing conditions. However, this function deteriorates with time and eventually a catalytic converter stops working properly. It is not well understood ...