Methanol crossover through PtRu/Nafion composite membrane for a direct methanol fuel cell

E. H. Jung, U. H. Jung, T. H. Yang, D. H. Peak, D. H. Jung, Sung Hyun Kim

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

This study examined methanol crossover through PtRu/Nafion composite membranes for the direct methanol fuel cell. For this purpose, 0.03, 0.05 and 0.10 wt% PtRu/Nafion composite membranes were fabricated using a solution impregnation method. The composite membrane was characterized by inductively coupled plasma-mass spectroscopy and thermo-gravimetric analysis. The methanol permeability and proton conductivity of the composite membranes were measured by gas chromatography and impedance spectroscopy, respectively. In addition, the composite membrane performance was evaluated using a single cell test. The proton conductivity of the composite membrane decreased with increasing number of PtRu particles embedded in the pure Nafion membrane, while the level of methanol permeation was retarded. From the results of the single cell test, the maximum performance of the composite membrane was approximately 27% and 31% higher than that of the pure Nafion membrane at an operating temperature of 30 and 45 °C, respectively. The optimum loading of PtRu was determined to be 0.05 wt% PtRu/Nafion composite membrane.The PtRu particles embedded in the Nafion membrane act as a barrier against methanol crossover by the chemical oxidation of methanol on embedded PtRu particles and by reducing the proton conduction pathway.

Original languageEnglish
Pages (from-to)903-907
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume32
Issue number7
DOIs
Publication statusPublished - 2007 May 1

Fingerprint

Direct methanol fuel cells (DMFC)
Composite membranes
fuel cells
Methanol
crossovers
methyl alcohol
membranes
composite materials
Proton conductivity
Membranes
Spectroscopy
protons
perfluorosulfonic acid
Inductively coupled plasma
Permeation
Impregnation
Gas chromatography
conductivity
Thermogravimetric analysis
Protons

Keywords

  • Composite membrane
  • DMFC
  • Methanol crossover
  • Nafion
  • PtRu

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment

Cite this

Methanol crossover through PtRu/Nafion composite membrane for a direct methanol fuel cell. / Jung, E. H.; Jung, U. H.; Yang, T. H.; Peak, D. H.; Jung, D. H.; Kim, Sung Hyun.

In: International Journal of Hydrogen Energy, Vol. 32, No. 7, 01.05.2007, p. 903-907.

Research output: Contribution to journalArticle

Jung, E. H. ; Jung, U. H. ; Yang, T. H. ; Peak, D. H. ; Jung, D. H. ; Kim, Sung Hyun. / Methanol crossover through PtRu/Nafion composite membrane for a direct methanol fuel cell. In: International Journal of Hydrogen Energy. 2007 ; Vol. 32, No. 7. pp. 903-907.
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