Core@shell bimetallic nanoparticle synthesis via anion coordination
Core@shell bimetallic nanoparticle synthesis via anion coordination
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DOI：
10.1038/nchem.1030
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发表时间：
2011-06-01
期刊：
影响因子：
21.8
通讯作者：
Beer, Paul D.
中科院分区：
文献类型：
--
作者：
Serpell, Christopher J.;Cookson, James;Beer, Paul D.
核@壳结构的纳米粒子由于其独特的电子、光学和催化性能而引起人们极大的兴趣。然而，它们的合成是不平凡的。我们报告了一种新的超分子路线的核心@壳纳米粒子的合成，基于阴离子配位协议的第一个功能，通过结合壳金属的表面的预形成的主金属核还原前。所得的金/钯和铂/钯核@壳纳米粒子的特征在于通过像差校正的扫描透射电子显微镜（以及其他技术），得到引人注目的原子分辨率图像的核@壳结构，和独特的催化性能的结构化的纳米粒子已被证明在显着改善的选择性生产有工业价值的氯苯胺从氯硝基苯。
Core@shell structured bimetallic nanoparticles are currently of immense interest due to their unique electronic, optical and catalytic properties. However, their synthesis is non-trivial. We report a new supramolecular route for the synthesis of core@shell nanoparticles, based on an anion coordination protocol-the first to function by binding the shell metal to the surface of the pre-formed primary metal core before reduction. The resultant gold/palladium and platinum/palladium core@shell nanoparticles have been characterized by aberration-corrected scanning transmission electron microscopy (as well as other techniques), giving striking atomic-resolution images of the core@shell architecture, and the unique catalytic properties of the structured nanoparticles have been demonstrated in a remarkable improvement of the selective production of industrially valuable chloroaniline from chloronitrobenzene.