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Electrochemical and XAS investigation of oxygen reduction reaction on Pt-TiO2-C catalysts

Ruiz-Camacho, B.; Valenzuela, M. A.; Gonzalez-Huerta, R. G.; Suarez Alcantara, Karina LU ; Canton, Sophie LU and Pola-Albores, F. (2013) In International Journal of Hydrogen Energy 38(28). p.12648-12656
Abstract
Pt-TiO2-C composites with different titanium oxide loading were synthesized by photo-deposition and chemical vapor deposition methods. The changes in their electronic properties improve the electrochemical activity toward the oxygen reduction reaction (ORR) compared to the Pt-C catalyst synthesized at the same conditions. The platinum samples were physically characterized by means of Transmission Electron Microscopy (TEM), Small Angle X-ray Scattering (SAXS), X-ray Absorption Spectroscopy (XAS) and X-ray Photo-electron Spectroscopy (XPS). Their electrochemical activity was also investigated by cyclic and linear voltammetry techniques. TEM analysis shows homogeneously dispersed platinum nanoparticles with an average particle size of 2 nm in... (More)
Pt-TiO2-C composites with different titanium oxide loading were synthesized by photo-deposition and chemical vapor deposition methods. The changes in their electronic properties improve the electrochemical activity toward the oxygen reduction reaction (ORR) compared to the Pt-C catalyst synthesized at the same conditions. The platinum samples were physically characterized by means of Transmission Electron Microscopy (TEM), Small Angle X-ray Scattering (SAXS), X-ray Absorption Spectroscopy (XAS) and X-ray Photo-electron Spectroscopy (XPS). Their electrochemical activity was also investigated by cyclic and linear voltammetry techniques. TEM analysis shows homogeneously dispersed platinum nanoparticles with an average particle size of 2 nm in all the synthesized samples. Form factor (morphology model) and particle size were determined by SAXS, the data adjusted to spherical Pt nanoparticles in both synthesis methods. XAS studies at the Pt L-3-edge shows a close interaction of Pt with the support material, i.e. C or TiO2. XPS analysis reveals surface modifications that induce electronic changes on Pt-TiO2-C. Significant differences in the ORR electrochemical activity were correlated to the TiO2 loading and the synthesis procedure. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Platinum, Titanium oxide, Oxygen reduction, XPS, Synchrotron radiation, XAS
in
International Journal of Hydrogen Energy
volume
38
issue
28
pages
12648 - 12656
publisher
Elsevier
external identifiers
  • wos:000324720800046
  • scopus:84883795098
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2013.01.002
language
English
LU publication?
yes
id
ead95925-129b-41c2-bf5a-145e1974540c (old id 4172552)
date added to LUP
2013-11-21 10:50:51
date last changed
2019-10-15 04:46:41
@article{ead95925-129b-41c2-bf5a-145e1974540c,
  abstract     = {Pt-TiO2-C composites with different titanium oxide loading were synthesized by photo-deposition and chemical vapor deposition methods. The changes in their electronic properties improve the electrochemical activity toward the oxygen reduction reaction (ORR) compared to the Pt-C catalyst synthesized at the same conditions. The platinum samples were physically characterized by means of Transmission Electron Microscopy (TEM), Small Angle X-ray Scattering (SAXS), X-ray Absorption Spectroscopy (XAS) and X-ray Photo-electron Spectroscopy (XPS). Their electrochemical activity was also investigated by cyclic and linear voltammetry techniques. TEM analysis shows homogeneously dispersed platinum nanoparticles with an average particle size of 2 nm in all the synthesized samples. Form factor (morphology model) and particle size were determined by SAXS, the data adjusted to spherical Pt nanoparticles in both synthesis methods. XAS studies at the Pt L-3-edge shows a close interaction of Pt with the support material, i.e. C or TiO2. XPS analysis reveals surface modifications that induce electronic changes on Pt-TiO2-C. Significant differences in the ORR electrochemical activity were correlated to the TiO2 loading and the synthesis procedure. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Ruiz-Camacho, B. and Valenzuela, M. A. and Gonzalez-Huerta, R. G. and Suarez Alcantara, Karina and Canton, Sophie and Pola-Albores, F.},
  issn         = {1879-3487},
  keyword      = {Platinum,Titanium oxide,Oxygen reduction,XPS,Synchrotron radiation,XAS},
  language     = {eng},
  number       = {28},
  pages        = {12648--12656},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Electrochemical and XAS investigation of oxygen reduction reaction on Pt-TiO2-C catalysts},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2013.01.002},
  volume       = {38},
  year         = {2013},
}