Synthesis of Platinum Nanotubes and Nanorings via Simultaneous Metal Alloying and Etching
Synthesis of Platinum Nanotubes and Nanorings via Simultaneous Metal Alloying and Etching
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通过同时金属合金化和蚀刻合成铂纳米管和纳米环
DOI：
10.1021/jacs.6b01328
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发表时间：
2016-05-25
影响因子：
15
通讯作者：
Nie, Zhihong
中科院分区：
文献类型：
--
作者：
Huang, Zhiqi;Raciti, David;Nie, Zhihong
金属纳米管代表了一类具有独特催化性能的中空纳米结构。然而，金属纳米管的湿化学合成仍然是一个巨大的挑战，特别是对于那些尺寸低于50 nm的纳米管。该通讯描述了一种同时合金化蚀刻策略，用于通过选择性蚀刻同轴Au/Pt纳米棒的Au核来合成具有开口端的Pt纳米管。当使用土星状Au核/Pt壳纳米颗粒时，这种方法可以扩展用于制备Pt纳米环。纳米管和纳米环的直径和壁厚可以分别容易地控制在14-37 nm和2-32 nm的范围内。我们进一步证明了具有双侧壁的纳米管在氧还原反应中表现出上级催化性能。
Metallic nanotubes represent a class of hollow nanostructures with unique catalytic properties. However, the wet-chemical synthesis of metallic nanotubes remains a substantial challenge, especially for those with dimensions below 50 nm. This communication describes a simultaneous alloying-etching strategy for the synthesis of Pt nanotubes with open ends by selective etching Au core from coaxial Au/Pt nanorods. This approach can be extended for the preparation of Pt nanorings when Saturn like Au core/Pt shell nanoparticles are used. The diameter and wall thickness of both nanotubes and nanorings can be readily controlled in the range of 14-37 nm and 2-32 nm, respectively. We further demonstrated that the nanotubes with ultrathin side walls showed superior catalytic performance in oxygen reduction reaction.