纳米Cu-Zr-O催化剂催化乙醇脱氢合成乙酸乙酯

以纳米ZrO₂为载体，采用浸渍法制备负载型CuO/ZrO₂催化剂；以凝胶Zr(OH)₄粉末为前驱物，制备掺杂型CuO-ZrO₂催化剂；采用共沉淀法制备共沉淀型催化剂CuO·ZrO₂。通过XRD、N₂吸附、TEM和SEM对催化剂进行表征。以乙醇氧化脱氢合成乙酸乙酯为探针反应，考察Cu-Zr-O催化剂的催化性能。结果表明，3种催化剂均为纳米级颗粒，并对乙醇脱氢合成乙酸乙酯反应均有催化活性。共沉淀型CuO·ZrO₂催化活性较好，在反应温度473 K，乙醇转化率为49%，乙酸乙酯选择性达88%。

Synthesis of ethyl acetate by dehydrogenation of ethanol over nanosized Cu-Zr-O catalysts

Supported CuO/ZrO2 catalysts were prepared by impregnation method. Doped CuO-ZrO2catalysts were prepared using Zr（ OH）4 gel as the precursor. CuO · ZrO2 catalysts were prepared by co-precipitated method. The as-prepared catalysts were characterized by XRD, N2 adsorption-desorption, TEM and SEM. Catalytic activity of the catalysts was investigated using dehydrogenation of ethanol to ethyl acetate as the probe reaction. The results indicated that all the catalysts were of nanometer size particles and exhibited catalytic activity for dehydrogenation of ethanol to ethyl acetate. The CuO · ZrO2 catalyst prepared by co-precipitation had the highest catalytic activity, with ethanol conversion of 49% and selectivity to ethyl acetate of 88% at reaction temperature of 473 K.