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中文摘要：
以β-环糊精（β-CD）为配体制备了Pd-β-CD胶体溶液，通过紫外-可见光谱和高倍透射电镜（HRTEM）等方法对其进行了表征，考察了胶体形貌并推测其络合方式．将此胶体负载于氧化铝载体上制备了新型高分散钯催化剂Pd-β-CD／γ-Al2O3。采用红外光谱和HRTEM等表征方法考察了其活性中心的负载情况．考察了催化剂对2-乙基葸醌加氢反应的催化性能，并与浸溃焙烧法制备的PdO／γ-Al2O3催化剂进行了对比．结果表明，以β-CD为介质制得的Pd-β-CD／γ-Al203催化剂的活性中心钯高分散在载体上，催化剂的活性更高，其氢化效率比PdO／γ-Al2O3高15．4％．
英文摘要：
The Pd-β-CD colloid was prepared using H2PdCl4 aqueous solution and β-cyclodextrin （β-CD） powders as the starting materials, and characterized by ultraviolet-visible spectroscopy and high transmission electron microscopy （HRTEM）. The colloid was supported on γ-Al2O3 to obtain a Pd-β-CD/γ-Al2O3 catalyst. The HRTEM result shows that Pd nanoparticles with a mean size of 3-4 nm are highly dispersed on γ-Al2O3 in the supported catalyst, which can be attributed to the dilution effect of β-CD as the ligand. In the hydrogenation of 2-ethylanthraquinone, the Pd-β-CD/γ-Al2O3 catalyst exhibits better catalytic activity than the PdO/γ-Al2O3 catalyst prepared by the impregnation-calcination method.
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