Sulfated titania as additive in Nafion membranes for water electrolysis applications

Siracusano, S. and Baglio, V. and Nicotera, I. and Mazzapioda, L. and Aricò, A.S. and Panero, S. and Navarra, M.A. (2017) Sulfated titania as additive in Nafion membranes for water electrolysis applications. International Journal of Hydrogen Energy, 42 (46). pp. 27851-27858. ISSN 0360-3199

Sulfated titania in Nafion membranes for water electrolysis IJHE 42 2017 27851-27858.pdf - Submitted Version

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Hydrogen produced by water splitting is a promising solution for a sustainable economy from renewable energy sources. With this respect, proton exchange membrane (PEM) electrolysis is one of the most suitable technologies, even though low cost, highly active catalysts and durable electrolyte membranes are still needed. Here we demonstrate the successful use of a nanocomposite, sulfated titania (S-TiO2)-added Nafion electrolyte coupled with home-made IrRuOxbased anode and commercial Pt cathode in lab-scale water electrolyzers. Superior electrolysis performances were found at 100 °C when comparing the hybrid electrolyte with undoped Nafion. Indeed, current densities of 4 A cm-2 and 3 A cm-2 were found at a terminal voltage of 2 V for the composite and plain membrane, respectively. Ex-situ conductivity measurements, as well as inoperando impedance spectra, were carried out, demonstrating the beneficial effect of the inorganic filler on membrane properties under practical operating conditions. NMR studies (PFG and relaxation time) corroborate the positive role of the nano-additive on the water retention capacity of the membrane, while the dynamic mechanical analysis shows that the hybrid membrane is stiffer and can resist to temperatures higher than undoped Nafion.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 540 Chimica e scienze connesse
600 Tecnologia - Scienze applicate > 660 Ingegneria chimica
Depositing User: Dr. Antonino Salvatore Aricò
Date Deposited: 17 Apr 2019 10:21
Last Modified: 17 Apr 2019 10:21

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