Kinetic Study of Oxygen Reduction Reaction on Palladium Nanoparticles Supported in Thermally Treated Carbon

  • R. Gonzalez Huerta Instituto Politécnico Nacional, IPN-ESIQIE, Laboratorio de Electroquímica y Corrosión, UPALM, Ed. 8, 07830, México D.F.
  • P. Gonzalez Puente Instituto Politécnico Nacional, IPN-ESIQIE, Laboratorio de Electroquímica y Corrosión, UPALM, Ed. 8, 07830, México D.F.
  • O. Solorza Feria Depto. Química, Centro de Investigación y de Estudios Avanzados del IPN, A. Postal 14-740, 07360 México, D.F.
Keywords: Electrocatalyst, Pd compounds, hydrogen peroxide, PEMFC

Abstract

The kinetic study of oxygen reduction reaction (ORR) using palladium nanoparticles supported in thermally-treated Vulcan® carbon as an electrocatalyst was developed in a 0.5 M H2SO4 solution. The Vulcan® carbon was thermally treated at 400oC and 600°C. The Pd supported in thermally treated carbon (Pd/TTC) was synthesized by PdCl2 reduction with NaBH4 in water at 60°C. The thermally treated carbon (TTC) was evaluated by Raman spectroscopy, whereas the morphology of Pd/TTC was characterized by Scanning Electron Microscopy (SEM). The electrochemical activity was studied by rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) techniques. The RDE result showed a high activity of the Pd/TTC towards the ORR, this reaction proceeds preferentially via a 4e- pathway. On the other hand, the hydrogen peroxide productions were 4.6% and 6.6% for Pd/(TTC at 400°C) and 600°C, respectively.

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v14n02a01_p069-073
Published
2011-04-07
Section
Full Articles