A series of nanometer rare-earth complex oxides catalysts La_(0.6)Cu_xMn_(1-x)O_3 was prepared by improved citric acid complex method. The phases of these catalysts was characterized by XRD. The results indicated that the perovskit crystals were formed at x ≤ 0.3, but perovskite and CuO phases coexisted at x > 0.3. The catalytic activity to ethanol is closely related to the temperature of catalytic reaction and the velocity of ethanol. At the temperature of 400 ℃, x = 0. 2, and the velocity of ethanol of 0.10mL/min, this La-Cu-Mn complex oxide had the best effect, the ethanol conversion was 35.56%, the selectivity of benzene was 13.05%.%用改进的柠檬酸络合法制备了由稀土与过渡金属组成的复合氧化物La_(0.6)Cu_xMn_(1-x)O_3.通过XRD考察了复合物的物相组成.结果表明,当x≤0.3时,可形成单相的钙钛矿结构;当x>0.3时,过量的Cu以CuO形式存在.通过它们对乙醇的催化反应考察了其催化活性.结果表明,该复合物能催化乙醇生成苯、乙酸乙酯等.当x=0.2、反应温度为400℃、乙醇流量为0.10mL/min时,复合氧化物的催化效果最好,乙醇转化率为35.56%,苯的选择性为13.05%.
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