Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 303, Issue -, Pages 49-55Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(00)00603-4
Keywords
cerium oxide; zirconium oxide; automotive exhaust catalysts; oxygen-storage capacity; catalytic converter
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This paper focuses on the development of ceria-zirconia materials which have high thermal stability and high catalytic activity. The CeO(2)-ZrO(2) system is very important as a sub-catalyst in the autoexhaust catalytic converters, especially on the oxygen-storage capacity (OSC). The role of the CeO(2)-ZrO(2) is to adjust the air-fuel ratio to the stoichiometric value to attain the simultaneous conversions of the three main pollutants such as CO, NO(x) and hydrocarbons, by providing and absorbing oxygen during fuel-rich and fuel-lean conditions, respectively. In this article, recent advances in the design and development of the sub-catalysts in the autoexhaust catalytic converters are reviewed. (C) 2000 Elsevier Science S.A. All rights reserved.
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