Controlled aqueous solution synthesis of platinum-palladium alloy nanodendrites with various compositions using amphiphilic triblock copolymers.
Controlled aqueous solution synthesis of platinum-palladium alloy nanodendrites with various compositions using amphiphilic triblock copolymers.
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DOI：
10.1002/asia.201000496
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发表时间：
2010-12
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影响因子：
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通讯作者：
Liang Wang;Y. Yamauchi
中科院分区：
文献类型：
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作者：
Liang Wang;Y. Yamauchi
在最近的一项研究中，我们证明了Pluronic F127三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. 2009，131，9152-9153）。在此，我们扩展这一概念，以产生新的树枝状Pt-Pd合金纳米粒子。本文提出了一种非常简单、高效的一步法直接制备高比表面积树枝状Pt-Pd合金纳米粒子的方法，其简单地通过搅拌含有K（2）PtCl（4）和Na（2）PdCl（4）的水溶液来进行，二元前体在Pluronic F127嵌段共聚物和抗坏血酸的存在下在室温下在30分钟内不需要任何模板，种子介导的生长或添加剂。通过简单地改变前体溶液中Pt和Pd源的组成比，可以容易地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一个强大的战略，生产铂钯合金纳米粒子与独特的纳米结构的商业设备。
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.