针对CeO₂负载Pt的催化体系存在CO氧化转化温度高等问题，利用原子层沉积技术制备的Pt/CeO₂催化剂可有效降低CO氧化温度，并通过改变Pt的沉积循环次数和预处理条件调控CO氧化性能，尤其是H₂气氛预处理之后对CO完全氧化的温度可低至60℃。通过XRD、ICP、TEM、XPS、H₂-TPR等手段对催化剂进行表征，结果表明，Pt高度分散在CeO₂纳米棒表面，Pt和CeO₂之间具有强的金属-载体相互作用，极大地提高了其对CO氧化反应的催化性能。

Both the catalytic oxidation of CO and the development of catalysts for oxidation of CO at low temperature are very significant for basic research and industrial applications.Pt/CeO₂ catalysts that are prepared via atomic layer deposition method can efficiently drop the temperature at which CO can be oxidized.The catalytic performance of Pt/CeO₂ can be improved effectively by tuning the cycles of Pt ALD and pretreatment conditions.Especially,the temperature for oxidation of CO can be as low as 60℃ after the catalysts are pretreated in a hydrogen atmosphere.The catalysts are characterized by XRD,ICP,TEM,XPS and H₂-TPR.It is found that Pt has been highly dispersed on the surface of CeO₂ nanorods,and there are strong interactions between Pt and CeO₂.After pretreated by hydrogen,the adsorption of CO by Pt can be enhanced,which can improve its catalytic performance for oxidation of CO.

孟甜甜(1994-),女,硕士研究生,研究方向为多相催化,ziminsheganshegan@163.com