全转化. 并用低温 N2吸附-脱附, 储氧量(OSC)测试, X 射线衍射(XRD), X 射线光电子能谱(XPS)和 H2程序升温 还原(H2-TPR)等手段对催化剂进行了表征. 研究结果表明, 适量 La 和 Al 共掺杂增大了氧化铈的比表面积和催 化剂中 Ce 3+ 所占的比例, 从而提高了催化剂对 SOF 的低温吸附能力和催化剂的储释放氧能力, 因而提高了催 化剂对 SOF 的氧化活性. 所制备的(CeO2)0.75(La-Al2O3)0.25复合氧化物适合应用到柴油车尾气净化催化剂中.
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