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-乙基蒽醌加氢反应的催化性能,并与浸渍焙烧法制备的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-Al2O3 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%.
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