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Plain Nafion and composite Nafion membranes investigated in this work.
| Sample | Filler | Filler content (wt %) | Sample acronym |
|---|---|---|---|
| Plain Nafion | None | 0 | N |
| Composite Nafion | Superacid S-TiO2 | 2 | 2-TiO2-S |
| Composite Nafion | Superacid S-TiO2 | 5 | 5-TiO2-S |
| Composite Nafion | Superacid S-TiO2 | 7 | 7-TiO2-S |
