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Hydrogen Storage by Titanium Based Sulfides: Nanoribbons (TiS₃) and Nanoplates (TiS₂)



Author(s)

Mariam Barawi, Eduardo Flores, Marine Ponthieu, José Ramón Ares, Fermín Cuevas, Fabrice Leardini, Isabel Jiménez Ferrer and Carlos Sánchez

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DOI:10.17265/2328-2223/2015.01.004

Nowadays, finding cheap and non-toxic materials able to reversibly store high amounts of hydrogen is a challenge in the renewable energy field. Metal sulfides seem to be promising candidates to this purpose. Titanium sulfides are reported to be particularly interesting but their ability to store hydrogen remains unclear. In this work, titanium based sulfides TiS2 and TiS3 with two-dimensional nanostructures have been synthesized by solid-gas reaction between titanium powder and sulfur at temperatures between 500-600 ºC. The morphology and crystal structure of Ti-sulfides were characterized by SEM (scanning electronic microscopy) equipped with EDX (energy dispersion X-ray) and XRD (X-ray diffraction), respectively. Their thermal stability was examined by TGA (thermal gravimetric analysis). Their hydrogenation properties have been determined by manometric means using a Sieverts system and by DSC-HP (high-pressure differential scanning calorimetric). Ti-sulfides hardly absorb/adsorb hydrogen for hydrogen pressures up to 80 bar and reaction temperatures up to 300 °C.

Hydrogen storage, titanium-sulfide, nanoribbons, nanoplates, layer compounds.