PDF(474 KB)
PDF(474 KB)
PDF(474 KB)
以空心SiO2为载体的蛋壳型贵金属Pd催化剂的制备及表征
Preparation and Characterization of EggShell Pd catalysts Supported on Hollow Silica
以空心SiO2为载体采用浸渍法制备了一系列蛋壳型贵金属Pd催化剂和Ca-Pd 催化剂，应用TEM，XRD和EDS方法表征催化剂。结果表明，贵金属Pd不仅能够负载到空心SiO2载体上，分散也比较均匀，且粒径较小，Pd/SiO2催化剂上Pd的粒径约为7 nm，Ca-Pd/SiO2催化剂上Pd的粒径约为5 nm。在蛋壳型催化剂Pd/SiO2 中加入助催化剂Ca能够形成蛋壳型Ca-Pd复合催化剂。空心SiO2可以作为蛋壳型贵金属Pd催化剂载体。催化活性评价结果表明，蛋壳型复合催化剂Ca-Pd/SiO2的催化活性和甲醇的选择性较纯Pd催化剂有了较大幅度的提高，其中催化活性提高了7倍。
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