中文摘要：

以Al^3＋／（Al^3＋＋Mg^2＋）摩尔比为0．2的水滑石（HT）为载体，采用还原浸渍法制备了负载型Pd—Ce—B／HT催化剂，并将其应用于液相苯酚选择性加氢制环己酮．与Pd—Ce—B／Al2O3，Pd—Ce—B／MgO和Pd—Ce—B／SiO2相比，Pd—Ce-B／HT催化剂具有高活性和高环己酮选择性．5．8％Pd—Ce—B／HT上苯酚的转化率和环己酮的选择性分别达82．0％和80．3％，显示了其潜在的工业化应用前景．根据多种表征结果，初步讨论了催化剂的构效关系以及添加剂Ce^3＋和载体酸碱性对催化性能的促进作用.

英文摘要：

Supported Pd-Ce-B catalysts were prepared by chemical reduction of Pd and Ce ions deposited on hydrotalcite （HT） with an Al^3＋/（Al^3＋ ＋ Mg^2＋ ） molar ratio of 0.2. In the reaction of liquid-phase selective hydrogenation of phenol, the as-prepared Pd-Ce-B/HT catalyst exhibited much higher activity and selectivity for cyclohexanone than Pd-Ce-B/Al2O3, Pd-Ce-B/MgO, and Pd-Ce-B/SiO2. The maximum phenol conversion and selectivity for cyclohexanone over 5.8 % Pd-Ce-B/HT reached 82.0 % and 80.3 %, respectively. Based on the results of various characterizations, the catalyst structure-activity correlation and the promoting effects of the Ce dopant and acidic-basic properties of the support on the catalyst behavior were discussed.