Membranes for direct methanol fuel cell based on modified heteropolyacids

M. L. Ponce, L. A. Prado, V. Silva, Suzana Nunes*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


Organic-inorganic membranes for direct methanol fuel cell (DMFC) application were prepared from sulfonated polyether ether ketone (SPEEK), containing heteropolyacids and an oxide phase either generated by hydrolysis ofamino-modified silanes or by dispersion of a surface-modified fumed silica. The heteropolyacid was based on lacunary divacant [γ-SiW10O36]8- and contained epoxy groups which reacted with the amino-groups in the oxide phase. The reaction provides a covalent bond between the heteropolyacid to the insoluble oxide phase, resulting in its fixation in the membrane. The organic-inorganic composites prepared in this way were more stable than the plain membrane, had lower methanol crossover and proton-conductivity in the same order of magnitude.

Original languageEnglish (US)
Pages (from-to)383-391
Number of pages9
Issue number1-3
StatePublished - Mar 10 2004


  • Fuel cells
  • Heteropolyacids
  • Organic-inorganic composite materials
  • Proton conductivity
  • Proton-conductive material

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science
  • Water Science and Technology
  • Mechanical Engineering


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