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- W2048092956 abstract "In this study, the mesoporous phenyl-silica (PS) is synthesized with tetraethoxysilane (TEOS) and phenyltriethoxysilane (PTES) as the Si-precursors. Then PS is sulfonated by the simple sulfonation with concentrated sulfuric acid to prepare the mesoporous sulfonated-phenyl-silica (SS). The Nafion®-based nanocomposite membranes, N/PS and N/SS, are successfully prepared with PS and SS silicas, respectively, and used as PEM for preparation of the PEMFC single cells. It is found that compared with the Nafion® membrane, NRE-212, and N/PSs, the best N/SS, SS1, which contains 3 wt.% of SS1 with about 5.18 wt.% sulfonic acid groups, exhibits more than 2-folds higher water uptake and slightly higher ion-exchange capacity (IEC). The highest proton conductivity of the as-prepared nanocomposite membranes at room temperature is in the same order as that of NRE-212. The power density of the PEMFC single cell fabricated with the best N/SS is 460 mW cm−2 at 110 °C under the humidified condition, which is approximately 13% and 53% higher than that with the N/PS and NRE-212. Besides, the peak power density obtained at 65 °C under dry condition is 414 mW cm−2, which is approximately 4 times higher than that of the N/PS." @default.
- W2048092956 created "2016-06-24" @default.
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- W2048092956 date "2011-08-01" @default.
- W2048092956 modified "2023-09-24" @default.
- W2048092956 title "Characterization and PEMFC application of a mesoporous sulfonated silica prepared from two precursors, tetraethoxysilane and phenyltriethoxysilane" @default.
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- W2048092956 doi "https://doi.org/10.1016/j.ijhydene.2011.04.186" @default.
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