利用水热法制备了不同形貌（棒状、八面体）的CeO₂，研究了CeO₂的不同晶面对催化湿式氧化DMF活性的影响。结果表明，在180℃、2.5 MPa O₂条件下反应5 h，CeO₂-R （纳米棒）的DMF转化率和COD去除率分别达到96.79%和70.24%，远高于CeO₂-O （纳米八面体）的48.97%和39.27%。相同反应条件下，Ru/CeO₂-R的DMF转化率和COD去除率均可达到100%，远高于Ru/CeO₂-O的74.51%和66.62%。对催化剂进行XRD、TEM、H₂-TPR和XPS等表征，结果表明，不同形貌的CeO₂载体所暴露的晶面不同，催化剂的催化活性与载体所暴露的不同晶面有关。

CeO₂ carriers with different morphologies (rod and octahedron) are prepared by hydrothermal method.The effects of different crystal planes of CeO₂ on its activity in catalytic wet oxidation of DMF are studied.The results show that the conversion of DMF and the removal rate of COD can reach 96.79% and 70.24%,respectively when the reaction has been performed over CeO₂-R at 180℃ and 2.5 MPa O₂ for 5 h,which are much higher than the 48.97% and 39.27% over CeO₂-O.Under the same reaction conditions,both the conversion of DMF and the removal rate of COD over Ru/CeO₂-R can reach 100%,much higher than 74.51% and 66.62% over Ru/CeO₂-O.The catalysts are characterized by XRD,TEM,H₂-TPR and XPS.The results indicate that the carriers with different morphologies expose different crystal planes,and the catalytic activity of the catalysts is related to the different crystal planes exposed by the carriers.

李明泉(1992-),男,硕士研究生,研究方向为催化湿式氧化催化剂的研究,limingquandjys@126.com