Facile preparation of Pt hydrosols by dispersing bulk Pt with potential perturbations
Facile preparation of Pt hydrosols by dispersing bulk Pt with potential perturbations
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通过潜在扰动分散散装 Pt 轻松制备 Pt 水溶胶
DOI：
10.1016/j.elecom.2008.12.021
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发表时间：
2009-02-01
影响因子：
5.4
通讯作者：
Li, Zelin
中科院分区：
文献类型：
--
作者：
Huang, Wei;Chen, Shu;Li, Zelin
将纯铂丝分散于NaOH溶液中，在方波电位（SWP）或交流电压（AV）作用下制备了铂水溶胶。在电势扰动（PPs）作用下，表面Pt原子通过重复的快速电氧化还原重排，再加上氢气的推动力，导致了Pt的分散。采用这种方法，我们可以在温和的条件下，在水溶液中实现不需要任何前驱离子和还原剂的绿色、简便的Pt纳米粒子的合成。此外，分散体铂也进行了成对电解与两个铂丝。采用扫描电镜（SEM）、透射电镜（TEM）和X射线粉末衍射（XRD）对所制备的Pt纳米粒子进行了表征。Pt纳米粒子对乙醇的电氧化表现出很高的电催化活性，对吸附的吡啶表现出较弱的表面增强拉曼散射（Sers）信号。(C)2008 Elsevier B.V.保留所有权利。
Pt hydrosols have been synthesized by dispersing a pure Pt wire in a NaOH solution with square wave potential (SWP) or alternating voltage (AV). The rearrangements of superfacial Pt atoms by repeated and fast electro-redox under the potential perturbations (PPs), coupling with the impetus of concurrent hydrogen gas, account for this novel dispersion of bulk Pt. Using this strategy we are able to realize the green and facile synthesis of clean Pt nanoparticles (NPs) requiring no any precursor ions and reducers in aqueous solution under mild conditions. Moreover, the dispersion of bulk Pt has also been carried out by paired electrolysis with two Pt wires. The as-prepared Pt NPs were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD). The Pt NPs exhibit high electrocatalytic activity toward the ethanol electrooxidation and weak surface-enhanced Raman scattering (SERS) signals for adsorbed pyridine. (C) 2008 Elsevier B.V. All rights reserved.