Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Synthesis and Solid-State NMR Studies of Proton-Conducting Mesoporous Niobium Oxide Polymer Composites with Nafion-Like Thermal Durability
AU - Turley, J.P.
AU - Romer, F.
AU - Trudeau, M.L.
AU - Smith, M.E.
AU - Hanna, J.V.
AU - Antonelli, D.M.
PY - 2015/10
Y1 - 2015/10
N2 - Proton conductivity and thermal durability studies were performed on a series of mesoporous Nb2O5 composites with naphthalene sulfonate formaldehyde resin polymerized within the pores. The proximity of the sulfonate groups of the polymer to the walls of the oxide mesostructure was deliberately tailored to ensure superior dehydration resistance crucial to proton conductivity. Initially characterized by nitrogen adsorption, XRD, TGA and STEM, subsequent study using impedance spectroscopy over a temperature range of 20–150 °C established their proton conductivity performance. The most promising sample displayed a conductivity of 21.77 mS cm−1 at 80 °C surpassing the literature value for Nafion 117 (8 mS cm−1) as measured in our labs using the same setup. Subsequent thermal durability tests demonstrated that this composite maintains superior conductivity to Nafion 117 at 80 °C for the length of the study (24 h). These observations were rationalized by in depth solid-state NMR studies. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
AB - Proton conductivity and thermal durability studies were performed on a series of mesoporous Nb2O5 composites with naphthalene sulfonate formaldehyde resin polymerized within the pores. The proximity of the sulfonate groups of the polymer to the walls of the oxide mesostructure was deliberately tailored to ensure superior dehydration resistance crucial to proton conductivity. Initially characterized by nitrogen adsorption, XRD, TGA and STEM, subsequent study using impedance spectroscopy over a temperature range of 20–150 °C established their proton conductivity performance. The most promising sample displayed a conductivity of 21.77 mS cm−1 at 80 °C surpassing the literature value for Nafion 117 (8 mS cm−1) as measured in our labs using the same setup. Subsequent thermal durability tests demonstrated that this composite maintains superior conductivity to Nafion 117 at 80 °C for the length of the study (24 h). These observations were rationalized by in depth solid-state NMR studies. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
KW - impedance spectroscopy
KW - mesoporous materials
KW - proton conductivity
KW - solids state NMR
KW - thermal durability
KW - Gas adsorption
KW - Light polarization
KW - Mesoporous materials
KW - Naphthalene
KW - Niobium compounds
KW - Niobium oxide
KW - Nuclear magnetic resonance spectroscopy
KW - Polymers
KW - Proton conductivity
KW - Spectroscopy
KW - Impedance spectroscopy
KW - Naphthalene sulfonates
KW - Nitrogen adsorption
KW - Polymer composite
KW - Proton conducting
KW - Sulfonate groups
KW - Temperature range
KW - Thermal durability
KW - Durability
U2 - 10.1002/cnma.201500077
DO - 10.1002/cnma.201500077
M3 - Journal article
VL - 1
SP - 430
EP - 437
JO - ChemNanoMat
JF - ChemNanoMat
SN - 2199-692X
IS - 6
ER -