In Situ Fabrication of Nafion–Titanate Hybrid Electrolytes for High-Temperature Direct Ethanol Fuel Cell
| Autor: | Marcelo Linardi, Elisabete I. Santiago, Bruno R. Matos, Fabio C. Fonseca, Andre S. Ferlauto, R.A. Isidoro, Ana C. Tavares |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Nanocomposite
Materials science Nanotechnology Atmospheric temperature range Direct-ethanol fuel cell Titanate Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake General Energy chemistry Chemical engineering Nafion symbols Nanorod Physical and Theoretical Chemistry Raman spectroscopy Ionomer |
| Zdroj: | The Journal of Physical Chemistry C. 117:16863-16870 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | The synthesis and characterization of a novel Nafion-matrix nanocomposite by the in situ conversion of titania particles into titanate nanofilaments such as nanotubes and nanorods are reported. Titania nanoparticles grown inside Nafion hydrophilic domains were converted by a microwave-assisted hydrothermal reaction into the proton conducting titanate nanotubes and nanorods. Detailed characterization by Raman spectroscopy, X-ray diffraction, small-angle X-ray scattering, and transmission electron microscopy evidenced an intimate interaction between titanate nanostructures and the ionomer hydrophilic phase. The favored localization of such high aspect ratio nanofilaments in the ionic phase of Nafion has a marked impact on the properties of the composites. The experimental data showed enhanced mechanical stability at high temperature (∼130 °C) that was correlated to a strong temperature dependence of the proton conductivity in the same temperature range. Such properties contributed to a significant increase ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|