RT info:eu-repo/semantics/article
T1 Spectroelectrochemical study of the electrosynthesis of Pt nanoparticles/poly(3,4-(ethylenedioxythiophene) composite
A1 Fernández Blanco, Ana Cristina
A1 Ibáñez Martínez, David
A1 Colina Santamaría, Álvaro
A1 Ruiz Fernández, Virginia
A1 Heras Vidaurre, Aránzazu
K1 Conducting polymers
K1 PEDOT
K1 Platinum nanoparticles
K1 Electrochemistry
K1 Spectroelectrochemistry
K1 Química analítica
K1 Chemistry, Analytic
AB 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
PB Elsevier
SN 0013-4686
YR 2014
FD 2014-11
LK http://hdl.handle.net/10259/3854
UL http://hdl.handle.net/10259/3854
LA eng
NO Ministerio de Ciencia y Tecnologia (CTQ2010-17127, V.R. Programa Ramon y Cajal), Junta de Castilla y Leon (GR71, BU349-U13), and Academy of Finland (V.R., Academy Research Fellow) is gratefully acknowledged. C. F-B. thanks Ministerio de Educacion, Cultura y Deporte for a predoctoral FPU fellowship. D.I. is grateful for his FPI-MICINN agreement of the Ministerio de Economia y Competitividad. ICTS of Complutense University of Madrid (Spain) and PCT-UBU of Burgos University (Spain) are also acknowledged for SEM images and EDX analysis, respectively.
DS Repositorio Institucional de la Universidad de Burgos
RD 23-abr-2024