کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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189573 | 459682 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation and electrocatalytic application of high dispersed Pt nanoparticles/ordered mesoporous carbon composites Preparation and electrocatalytic application of high dispersed Pt nanoparticles/ordered mesoporous carbon composites](/preview/png/189573.png)
A simple approach for the synthesis of nanosized platinum particles supported on ordered mesoporous carbons (OMCs) was described. For the first time, we successfully used the positively charged poly-(diallydimethylammonium chloride, PDDA) to wrap OMCs and attached Pt nanoparticles (OMCs–PDDA/Pt) via electrostatic interaction. The obtained OMCs–PDDA/Pt nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical methods. TEM images reveal that the Pt nanoparticles with an average size of ∼2.88 nm are uniformly dispersed on the surface of OMCs–PDDA. The electrocatalytic behavior of OMCs–PDDA/Pt modified glassy carbon (GC) electrode was investigated by cyclic voltammetry, current–time and chronoamperometry methods using hydrazine as a redox probe. The electrochemical results indicate that the OMCs–PDDA/Pt exhibit a good electrocatalytic activity toward the oxidation of hydrazine than that of OMCs/Pt. All these electrochemical measurements confirm the fact that the OMCs–PDDA/Pt nanocomposites may have applications in biological and environmental sensors.
Small Pt nanoparticles of uniform size and good dispersion are grown on the surfaces of OMCs using PDDA as a linker. The Pt nanoparticles supported on OMCs–PDDA exhibit better electrocatalytic activity than those on OMCs without PDDA modification.Figure optionsDownload as PowerPoint slide
Journal: Electrochimica Acta - Volume 56, Issue 17, 1 July 2011, Pages 5849–5854