Proton Conductivity of Naphthalene Sulfonate Formaldehyde Resin-Doped Mesoporous Niobium and Tantalum Oxide Composites

Jonathan P. Turley*, Frederik Romer, Michel L. Trudeau, Marcos L. Dias, Mark E. Smith, John V. Hanna, David M. Antonelli

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Proton conductivity in a series of mesoporous niobium and tantalum metal oxide (mX(2)O(5)) composites of naphthalene sulfonic acid formaldehyde resin (NSF) that are resistant to moisture loss at temperatures greater than 50 degrees C is reported. The investigation focuses on the effect to proton conductivity by changing pore size and metal in the mesostructure of the mX(2)O(5) system and thus, a series of mX(2)O(5)-NSF composites were synthesized with C-6, C-12, and C-18 templates. These were characterized by XRD, thermogravimetric analysis, nitrogen ad-sorption, and scanning TEM and then studied using impedance spectroscopy to establish proton conductivity values at various temperatures ranging from 25 to 150 degrees C. The most promising sample displayed a conductivity of 21.96 mScm(-1) at 100 degrees C, surpassing the literature value for Nafion 117 (ca. 8 mS cm(-1)). H-1 and C-13 solid state NMR studies the mX(2)O(5)-NSF composites demonstrate that the oligomeric nature of the NSF is preserved while in contact with the mX(2)O(5) surface, thus facilitating conductivity.

    Original languageEnglish
    Pages (from-to)301-309
    Number of pages9
    JournalChemsuschem
    Volume8
    Issue number2
    DOIs
    Publication statusPublished - Jan 2015

    Keywords

    • impedance spectroscopy
    • mesoporous materials
    • polymers
    • proton conductivity
    • solid state NMR
    • METHANOL FUEL-CELLS
    • POLYMER ELECTROLYTE MEMBRANE
    • HIGH-TEMPERATURE OPERATION
    • MOLECULAR-SIEVES
    • NAFION
    • ACID
    • WATER
    • NANOPARTICLES
    • PERFORMANCE
    • SURFACE

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