Novel in situ electrochemical deposition of platinum nanoparticles by sinusoïdal voltages on conducting polymer films.Report as inadecuate




Novel in situ electrochemical deposition of platinum nanoparticles by sinusoïdal voltages on conducting polymer films. - Download this document for free, or read online. Document in PDF available to download.

1 Department of Analytical Chemistry and Instrumental Analysis. 2 UTINAM - Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules 3 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies

Abstract : Platinum Pt nanoparticles were successfully electrodeposited in situ on an organic conductive polymer, poly3,4-ethylenedioxythiophene PEDOT, using for the first time sinusoidal voltages of various frequencies in a chloroplatinic acid solution. The organic PEDOT matrix was electrodeposited on Pt electrode chips. The Pt electrode chips consist of a 150 nm Pt layer deposited on 100-oriented standard 3- silicon wafers. The cyclic voltammograms of the PEDOT-Pt-nanoparticles composite material recorded in 0.5 M H2SO4 aqueous solution demonstrated that Pt nanoparticles are electrochemically active. Values of the roughness of the composite materials, measured by optical non-contact 3D profilometry, ranging from 880 nm to 1.6 m were obtained depending on the time of deposition of the nanoparticles. The PEDOT-Pt-nanoparticles composite deposited by a sinusoidal voltage with a frequency range of 0.1 Hz - 100 kHz, 50 frequencies, has the largest active surface area 5.16 cm2 compared with other composite coatings prepared in this work and those previously reported. Atomic force microscopic AFM images revealed the presence of numerous deposited Pt nanoparticles on the organic PEDOT polymer film.

Keywords : Platinum metal nanoparticles Atomic force microscopy Sinusoidal voltage Poly3 4- ethylenedioxythiophene Platinum metal nanoparticles.





Author: Stelian Lupun - Boris Lakard - Jean-Yves Hihn - Jérôme Dejeu -

Source: https://hal.archives-ouvertes.fr/



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