Palladium nanoparticles supported on a two-dimensional layered zeolitic imidazolate framework-L as an efficient size-selective catalyst
Palladium nanoparticles supported on a two-dimensional layered zeolitic imidazolate framework-L as an efficient size-selective catalyst
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DOI：
10.1016/j.micromeso.2015.09.053
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发表时间：
2016-02
影响因子：
5.2
通讯作者：
Songlin Xue;Hong Jiang;Z. Zhong;Ze-Xian Low;Rizhi Chen;W. Xing
中科院分区：
文献类型：
--
作者：
Songlin Xue;Hong Jiang;Z. Zhong;Ze-Xian Low;Rizhi Chen;W. Xing
以二维层状咪唑骨架L型分子筛（ZIF-L）为载体，采用组装法组装钯纳米粒子，合成了一种具有独特十字星形状、粒径约为20 μm的新型Pd@ZIF-L杂化催化剂。在层之间具有尺寸为6.64 μ m的独特椭圆形空腔的混合催化剂可用于扩散其他ZIF系统如ZIF-8无法实现的特定反应物。Pd@ZIF-L的晶体结构和形貌强烈依赖于合成条件。钯纳米粒子的平均尺寸为3 nm的均匀封装在ZIF-L晶体。所合成的Pd@ZIF-L催化剂有利于大分子链烯烃的转化，具有良好的分子尺寸选择性和抗沥滤性能。
A new Pd@ZIF-L hybrid catalyst having a unique crosshair-star shape with a size of about 20 μm was synthesized, in which a two-dimensional layered zeolitic imidazolate framework-L (ZIF-L) was used as a support to immobilize palladium nanoparticles via an assembly method. The hybrid catalyst with unique cushion-shaped cavities between layers with a size of 6.64 Å can be used for the diffusion of specific reactants not achievable by other ZIF systems such as ZIF-8. The crystal structure and morphology of Pd@ZIF-L are strongly dependent on the synthesis conditions. Palladium nanoparticles with an average size of 3 nm are homogeneously encapsulated in the ZIF-L crystals. The as-synthesized Pd@ZIF-L catalyst favors the conversion of alkenes with larger molecular sizes, and exhibits excellent molecule-size-selectivity and anti-leaching performance.