Influence of Nafion loading in the catalyst layer of gas-diffusion electrodes for PEFC

E. Antolini, L. Giorgi, A. Pozio, E. Passalacqua

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Abstract

The effect of Nafion loading in the catalyst layer of cathodes for polymer electrolyte fuel cells (PEFCs) was investigated. Steady-state galvanostatic polarisation (GP), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) measurements were carried out at 25°C in 1.0 M H2SO4on electrodes with different Nafion loadings. EIS supplied information on the polarization resistance and CV on the electrochemical active area for the oxygen reduction reaction (ORR). These parameters, together with those derived from GP, allowed a better identification of the features governing the ORR. An optimum Nafion loading was identified. This loading was found to correspond to a minimum in the polarization resistance and in the oxygen reduction overpotential and a maximum in the electrochemical active area. © 1999 Elsevier Science S.A. All rights reserved.
Original languageEnglish
Pages (from-to)136 - 142
Number of pages7
JournalJournal of Power Sources
Volume77
Issue number2
DOIs
Publication statusPublished - 1999

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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