中文摘要：

采用共沉淀法制备了Cu—Cr2O3催化剂，考察了铜含量对Cu—Cr2O3催化剂的二氟乙酸甲酯加氢合成二氟乙醇性能的影响。运用x射线衍射（XRD）、程序升温还原（TPR）、BET和Raman光谱技术对该催化剂进行了表征。结果表明，还原态Cu—Cr2O3催化剂物相主要由Cu和Cr2O3组成，然而30Cu—Cr2O3和50Cu—Cr2O3催化剂存在少量CuCr2O4和CuCrO2复合氧化物。随着铜含量的增加，Cu—Cr2O3催化剂的二氟乙酸甲酯单程转化率呈现先上升后下降的趋势，而二氟乙醇选择性保持在70％左右；30Cu—Cr2O3催化剂的二氟乙酸甲酯单程转化率达到最大值97％。CuCr2O3催化剂的二氟乙酸甲酯加氢反应比速率随着铜含量的增加呈现增大的趋势，反应比速率的提高可能与催化剂中CuCr2O4和CuCrO2物种的存在有关。

英文摘要：

Cu-Cr2O3 catalysts were prepared by the coprecipitation method. The effect of Cu content on catalytic performance for hydrogenation of methyl difluoroacetate to 2, 2-difluoroethanol was investigated. The catalysts were characterized with XRD, H2-TPR, BET and Raman techniques. The results showed that the reduced Cu-Cr2 O3 catalysts contained mainly Cu and Cr2 O3, while catalysts with a high Cu content （e. g. 30 Cu-Cr2O3 and 50 Cu-Cr2 O3） contained CuCr2O4 and CuCrO2 oxides. It was also found that with increasing Cu content, conversion of methyl difluoroaeetate first increased and then slightly decreased and selectivity to 2,2-difluoroethanol was about 70 %. The 30Cu-Cr2O3 catalyst exhibited the highest conversion of 97%. In addition, conversion of methyl difluoroacetate increased gradually in bicomponent Cu-Cr2O3 catalysts with increasing Cu content, which was probably due to the presence of CuCr2O4 and CuCrO2 oxides.