Recent Developments in Doping and Structural Modification of Ceria-Based Catalysts
来源期刊：JOURNAL OF RARE EARTHS2005年第3期
论文作者：Feng Changgen Fan Guodong
Key words：ceria-based oxides; dopants; structural modification; redox aging; chemical filing; rare earths;
Abstract: Recent development in the modification of ceria-based catalysts for exhaust gas treatment was reviewed with the dependence of redox properties on structural characters of materials. The doping of ceria with different cations such as rare earth or transition metal oxides results in improvement of structural stability, catalytic function and resistance to sintering at high temperatures. Aging and reduction treatment at high temperatures promote ceria reduction and is beneficial for oxygen storage capacity of the three-way catalysts. Chemical filing technique is very effective in modifying the redox property in the low temperature regions.
Feng Changgen1，Fan Guodong1
(1.State Key Laboratory of Prevention and Control of Explosion Disasters, Beijing Institute of Technology, Beijing 100081, China)
Abstract:Recent development in the modification of ceria-based catalysts for exhaust gas treatment was reviewed with the dependence of redox properties on structural characters of materials. The doping of ceria with different cations such as rare earth or transition metal oxides results in improvement of structural stability, catalytic function and resistance to sintering at high temperatures. Aging and reduction treatment at high temperatures promote ceria reduction and is beneficial for oxygen storage capacity of the three-way catalysts. Chemical filing technique is very effective in modifying the redox property in the low temperature regions.
Key words:ceria-based oxides; dopants; structural modification; redox aging; chemical filing; rare earths;
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