文章基本信息

标题：Short peptide-directed synthesis of one-dimensional platinum nanostructures with controllable morphologies
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作者：Kai Tao ; Jiqian Wang ; Yanpeng Li 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
期号：1
DOI：10.1038/srep02565
语种：English
出版社：Springer Nature
摘要：Although one dimensional (1D) Pt nanostructures with well-defined sizes and shapes have fascinating physiochemical properties, their preparation remains a great challenge. Here we report an easy and novel synthesis of 1D Pt nanostructures with controllable morphologies, through the combination of designer self-assembling I₃K and phage-displayed P7A peptides. The nanofibrils formed via I₃K self-assembly acted as template. Pt precursors ((PtCl₄)²⁻ and (PtCl₆)²⁻) were immobilized by electrostatic interaction on the positively charged template surface and subsequent reduction led to the formation of 1D Pt nanostructures. P7A was applied to tune the continuity of the Pt nanostructures. Here, the electrostatic repulsion between the deprotonated C-terminal carboxyl groups of P7A molecules was demonstrated to play a key role. We finally showed that continuous and ordered 1D Pt morphology had a significantly improved electrochemical performance for the hydrogen and methanol electro-oxidation in comparison with either 1D discrete Pt nanoparticle assemblies or isolated Pt nanoparticles.