Investigation of H2 Gas Transport in Recast Nafion Films Coated on Platinum in Hydrogen Saturated 85% Phosphoric Acid

D. Gervasio, R. F. Savinell, R. L. Zeller, D. S. Fritts

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Electrochemical impedance spectroscopy measurements were performed with bare and with recast Nafion film-coated Pt electrodes in hydrogen saturated 85% phosphoric acid in order to determine the effects of the film on the transport properties of hydrogen. The impedance data were fit to a model equivalent circuit using nonlinear regression techniques. Two parallel gas diffusion paths in the Nafion film can be inferred from the data. The diffusion coefficients were estimated for each diffusion path in the film. The concentration of hydrogen in the recast Nafion film was found to be over fifteen times greater than in the surrounding solution.

Original languageEnglish (US)
Pages (from-to)3345-3349
Number of pages5
JournalJournal of the Electrochemical Society
Volume138
Issue number11
DOIs
StatePublished - Jan 1 1991
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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