Fabrication of Yolk–shell Pd@ZIF-8 Nanoparticles with Excellent Catalytic Size-selectivity for the Hydrogenation of Olefins
Fabrication of Yolk–shell Pd@ZIF-8 Nanoparticles with Excellent Catalytic Size-selectivity for the Hydrogenation of Olefins
复制标题
具有优异催化尺寸选择性的蛋黄壳 Pd@ZIF-8 纳米粒子用于烯烃加氢的制备
DOI：
10.1039/c5ce02219c
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发表时间：
2016
期刊：
影响因子：
3.1
通讯作者：
Jian-Ping Lang
中科院分区：
文献类型：
--
作者：
Fei-Long Li;Hong-Xi Li;Jian-Ping Lang
In this work, we fabricate new yolk–shell Pd@ZIF-8 (ZIF = zeolitic imidazolate framework) nanoparticles (NPs) through reactions of the preformed core–shell Pd@ZnO NPs with 2-methylimidazole under mild conditions. In this method, ZnO is used as the self-template and the Zn2+ source for the formation of the ZIF-8 shell. The morphology, composition and structure of the as-prepared yolk–shell nanomaterial are characterized by scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, powder X-ray diffraction, energy dispersive X-ray spectroscopy, and inductively coupled plasma atomic emission spectroscopy. The formation of this well-defined yolk–shell nanostructure is highly dependent on the solvent system and reaction time. This nanomaterial can be employed as an excellent heterogeneous catalyst for the liquid-phase hydrogenation of olefins with high size-selectivity at room temperature, which is mainly due to the inherent porous structure of the outer ZIF-8 shell along with the enclosed Pd NPs. The nanocatalyst system can be recycled at least three times without any evident loss of the catalytic efficiency.
