Preparation of ceria–zirconia sub-catalysts for automotive exhaust cleaning

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–...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 303; pp. 49 - 55
Main Authors Masui, Toshiyuki, Ozaki, Tetsuya, Machida, Ken-ichi, Adachi, Gin-ya
Format Journal Article
LanguageEnglish
Published Elsevier B.V 24.05.2000
Subjects
Automotive exhaust catalysts
Catalytic converter
Cerium oxide
Oxygen-storage capacity
Zirconium oxide
Zirconium oxide
Cerium oxide
Catalytic converter
Automotive exhaust catalysts
Oxygen-storage capacity
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Summary: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.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(00)00603-4