Facile preparation of Pt hydrosols by dispersing bulk Pt with potential perturbations

被引：34

作者：

Huang, Wei ^{[1
]}

Chen, Shu ^{[1
]}

Zheng, Jufang ^{[2
]}

Li, Zelin ^{[1
]}

机构：

[1] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Peoples R China

[2] Zhejiang Normal Univ, Inst Phys Chem, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua 321004, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Pt nanoparticles; Potential perturbations; Dispersion; Paired electrolysis; Electrocatalytic oxidation; Surface enhanced Raman scattering; ENHANCED RAMAN-SCATTERING; METAL-CLUSTERS; COLLOIDS; NANOPARTICLES; ELECTRODES; ADSORPTION; PLATINUM;

D O I：

10.1016/j.elecom.2008.12.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：469 / 472

页数：4

共 17 条

[1] ELECTROCHEMICAL FACETING OF METAL-ELECTRODES [J].