Variable temperature proton conductivity of mesoporous titanium oxides doped with naphthalene sulfonate formaldehyde resin
Variable temperature proton conductivity of mesoporous titanium oxides doped with naphthalene sulfonate formaldehyde resin
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DOI：
10.1016/j.micromeso.2014.02.022
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发表时间：
2014-05
影响因子：
5.2
通讯作者：
J. Turley;Frederik Romer;M. Trudeau;M. Dias;Mark E. Smith;J. Hanna;D. Antonelli
中科院分区：
文献类型：
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作者：
J. Turley;Frederik Romer;M. Trudeau;M. Dias;Mark E. Smith;J. Hanna;D. Antonelli
在本报告中，我们试图通过利用磺酸基与介孔氧化钛内孔壁亲水性表面的相互作用来合成抗脱水材料，以形成质子传导通道。因此，合成了六种萘磺酸甲醛（NSF）介孔氧化钛复合材料，并对其进行了充分表征，形成了用于恒电位阻抗测量的颗粒。最有希望的样品是介孔TiO2（mTiO2）的NSF复合材料，在100°C时的质子电导率为1.837 mS cm - 1，超过了在相同条件下作为参考构建的Nafion 117颗粒（1.143 mS cm - 1）。该材料的电导率也高于纯水合NSF (0.122 mS cm−1)，证实了NSF与氧化物介结构在质子电导率机制中的协同相互作用。NSF材料和mTiO2-NSF复合材料的1h和13c固体核磁共振研究表明，当NSF与mtio2表面接触时，其低聚物性质得以保留，从而有利于导电。
In this report we attempt to synthesize materials resistant to dehydration by exploiting the interaction of sulfonate groups with the hydrophilic surfaces of the inner pore walls of mesoporous titanium oxides to form channels for proton conduction. Thus, six mesoporous titanium oxide composites of naphthalene sulfonate formaldehyde (NSF) were synthesised, fully characterised and formed into pellets for potentiostatic impedance measurements. The most promising sample, a NSF composite of mesoporous TiO2(mTiO2), displays a proton conductivity of 1.837 mS cm−1at 100 °C surpassing that of a pellet of Nafion 117 constructed as a reference under the same conditions (1.143 mS cm−1). This material also has greater conductivity than pure hydrated NSF (0.122 mS cm−1), confirming a synergistic interaction between the NSF and the oxide mesostructure in the proton conductivity mechanism. Both1H and13C solid state NMR studies of the NSF material and the mTiO2–NSF composites demonstrate that the oligomeric nature of the NSF is preserved while in contact with the mTiO2surface, thus facilitating conductivity.