2024-03-28T22:34:35Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/38542021-11-10T09:38:17Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Fernández Blanco, Ana Cristina
Ibáñez Martínez, David
Colina, Álvaro
Ruiz Fernández, Virginia
Heras, Aránzazu
2015-09-29T09:29:32Z
2015-09-29T09:29:32Z
2014-11
0013-4686
http://hdl.handle.net/10259/3854
10.1016/j.electacta.2014.08.004
UV-Visible, NIR and Raman spectroelectrochemistry techniques have been used for the in-situ study of Pt nanoparticles (PtNPs) electrosynthesis on an electrochemically generated poly(3,4-ethylenedioxythiophene) film. Two electrochemical steps have been used to obtain in a reproducible way PtNPs with catalytic properties towards methanol oxidation: 1) deposition of Pt nuclei on the polymer modified electrode, 2) growth of these nuclei to form nanoparticles yielding drastic changes in the spectroscopic signal and a significant increase of the amount of Pt. A two steps procedure facilitates an interfacial growth mechanism of the nuclei over a diffusion controlled growth. Evolution of UV-Visible and NIR spectra during these two PtNPs synthesis steps helps to understand and explain the mechanism of generation of these nanoparticles. Besides, Energy Dispersive X-Ray analysis and Scanning Electron Microscopy images registered of the composite after each step of synthesis confirm the conclusions extracted from spectroelectrochemistry data
eng
info:eu-repo/semantics/openAccess
Conducting polymers
PEDOT
Platinum nanoparticles
Electrochemistry
Spectroelectrochemistry
Spectroelectrochemical study of the electrosynthesis of Pt nanoparticles/poly(3,4-(ethylenedioxythiophene) composite
info:eu-repo/semantics/article