本文采用溶胶-凝胶法制备了负载在γ-Al2O3上,含有Ce-Zr、Pr-Zr、Ce-Pr-Zr固溶体的样品.进行了三效催化活性的评价,程序升温还原(TPR)表征和储氧量的测定.结果表明,样品均具有较高的三效催化活性,尤其是含有Pr的样品,老化后在富氧区(S＝1.30)的NOx转化率较高,达到65%以上,其中由Pr修饰的Ce-Zr固溶体的样品的储氧量最大.
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