World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
Chem Asian J. 2010 Dec 3;5(12):2493-8. doi: 10.1002/asia.201000496.
In a recent study, we demonstrated that Pluronic F127 triblock copolymer plays a critical role in the formation of dendritic Pt nanostructures (L. Wang, Y. Yamauchi, J. Am. Chem. Soc. 2009, 131, 9152-9153). Herein, we expand this concept to produce novel dendritic Pt-Pd alloy nanoparticles. In this paper, a very simple, one-step and efficient route is proposed to directly produce dendritic Pt-Pd alloy nanoparticles with high surface area in high yield, which is carried out simply by stirring an aqueous solution that contains K(2)PtCl(4) and Na(2)PdCl(4) binary precursors in the presence of Pluronic F127 block copolymer and ascorbic acid at room temperature within 30 min without the need for any template, seed-mediated growth, or additive. By simply changing the compositional ratios of the Pt and Pd sources in the precursor solutions, Pt-Pd nanodendrites with various compositions can be easily produced. Because of its unique simplicity, the proposed approach can be considered as a powerful strategy for producing Pt-Pd alloy nanoparticles with unique nanoarchitectures for commercial devices.
在最近的一项研究中，我们证明了 Pluronic F127 嵌段共聚物在树枝状 Pt 纳米结构的形成中起着关键作用（L. Wang, Y. Yamauchi, J. Am. Chem. Soc. 2009, 131, 9152-9153）。在此，我们扩展了这一概念，以制备新型树枝状 Pt-Pd 合金纳米粒子。本文提出了一种非常简单、一步高效的方法，可以直接在高产量下制备具有高表面积的树枝状 Pt-Pd 合金纳米粒子，该方法只需在室温下搅拌含有 K(2)PtCl(4)和 Na(2)PdCl(4)二元前体的水溶液，在 Pluronic F127 嵌段共聚物和抗坏血酸的存在下，在 30 min 内即可完成，无需任何模板、种子介导生长或添加剂。通过简单改变前体溶液中 Pt 和 Pd 源的组成比，可以轻松制备具有各种组成的 Pt-Pd 纳米枝晶。由于其独特的简单性，所提出的方法可以被认为是用于制备具有独特纳米结构的 Pt-Pd 合金纳米粒子的一种有力策略，可用于商业器件。
