Rubio, César, Murillo, Beatriz, Casado-Coterillo, Clara, Mayoral, Álvaro, Téllez, Carlos, Coronas, Joaquín, Berenguer-Murcia, Ángel, Cazorla-Amorós, Diego
Development of exfoliated layered stannosilicate for hydrogen adsorption
International Journal of Hydrogen Energy. 2014, 39(25): 13180-13188. doi:10.1016/j.ijhydene.2014.06.149
URI: http://hdl.handle.net/10045/44756
DOI: 10.1016/j.ijhydene.2014.06.149
ISSN: 0360-3199 (Print)
Abstract: 
The use of hydrogen as an energy vector leads to the development of materials with high hydrogen adsorption capacity. In this work, a new layered stannosilicate, UZAR-S3, is synthesized and delaminated, producing UZAR-S4. UZAR-S3, with the empirical formula Na4SnSi5O14·3.5H2O and lamellar morphology, is a layered stannosilicate built from SnO6 and SiO4 polyhedra. The delamination process used here comprises three stages: protonation with acetic acid, swelling with nonylamine and the delamination itself with an HCl/H2O/ethanol solution. UZAR-S4 is composed of sheets a few nanometers thick with a high aspect ratio and a surface area of 236 m2/g, twenty times higher than that of UZAR-S3. At −196 °C for UZAR-S4, H2 adsorption reached remarkable values of 3.7 and 4.2 wt% for 10 and 40 bar, respectively, the latter value giving a high volumetric H2 storage capacity of 26.2 g of H2/L.
Keywords:Hydrogen storage, Layered stannosilicates, Delaminated materials
Elsevier
info:eu-repo/semantics/article