Synthesis and Characterization of Monolayer-Capped PtVFe Nanoparticles with Controllable Sizes and Composition
Synthesis and Characterization of Monolayer-Capped PtVFe Nanoparticles with Controllable Sizes and Composition
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DOI：
10.1021/cm0508219
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发表时间：
2005-09
影响因子：
8.6
通讯作者：
Jin Luo;L. Han;N. Kariuki;Lingyan Wang;D. Mott;†. A. Chuan-Jian Zhong;T. He
中科院分区：
文献类型：
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作者：
Jin Luo;L. Han;N. Kariuki;Lingyan Wang;D. Mott;†. A. Chuan-Jian Zhong;T. He
在制备二元或三元催化剂时，控制金属纳米颗粒的大小和组成的能力是必不可少的。本文报道了一种核壳合成方案的研究结果，该方案用于制备具有几纳米核尺寸的单层覆盖三元铂-钒-铁（PtVFe）纳米颗粒。我们的方法包括在单一有机相中以可控的比例使用金属前驱体、封盖剂和还原剂进行反应。通过控制乙酰丙酮铂、乙酰丙酮钒和五羰基铁等金属前驱体和油胺、油酸等封盖剂的相对浓度比，成功地合成了以混合胺/酸单层为外壳包裹纳米晶PtVFe核的核-壳型纳米颗粒。纳米晶芯的平均直径控制在1.4 ~ 3.5 nm之间，具有较高的单分散性（±0.3 ~ 0.5 nm）。炼金术士……
The ability to control the size and composition of metal nanoparticles is essential in preparing binary or ternary catalysts. This paper reports the results of an investigation of a core−shell synthesis protocol for the preparation of monolayer-capped ternary platinum−vanadium−iron (PtVFe) nanoparticles with a few nanometers in core sizes. Our approach involves the use of metal precursors, capping agents, and reducing agents in controllable ratios for the reaction in a single organic phase. By manipulating the relative concentration ratios of the metal precursors such as platinum acetylacetonate, vanadyl acetylacetonate, and iron pentacarbonyl, and capping agents such as oleic amine and oleic acids, the core−shell type nanoparticles in which the nanocrystal PtVFe cores are encapsulated with a shell of mixed amine/acid monolayer have been successfully synthesized. The average diameters of the nanocrystalline cores are well controlled between 1.4 and 3.5 nm with high monodispersity (±0.3−0.5 nm). The chemic...