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 nano-composite, sulfated titania (S-TiO2)-added Nafion electrolyte coupled with home-made IrRuOx-based 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 in-operando 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.

Sulfated titania as additive in Nafion membranes for water electrolysis applications / Siracusano, S.; Baglio, V.; Nicotera, I.; Mazzapioda, Lucia; Aricã², A. S.; Panero, Stefania; Navarra, MARIA ASSUNTA. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - 42:(2017), pp. 27851-27858. [10.1016/j.ijhydene.2017.05.136]

Sulfated titania as additive in Nafion membranes for water electrolysis applications

Mazzapioda, Lucia;PANERO, Stefania;NAVARRA, MARIA ASSUNTA
2017

Abstract

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 nano-composite, sulfated titania (S-TiO2)-added Nafion electrolyte coupled with home-made IrRuOx-based 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 in-operando 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.
Functionalized inorganic nano-additives; composite polymer electrolyte; water electrolyzers
01 Pubblicazione su rivista::01a Articolo in rivista
Sulfated titania as additive in Nafion membranes for water electrolysis applications / Siracusano, S.; Baglio, V.; Nicotera, I.; Mazzapioda, Lucia; Aricã², A. S.; Panero, Stefania; Navarra, MARIA ASSUNTA. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - 42:(2017), pp. 27851-27858. [10.1016/j.ijhydene.2017.05.136]
File allegati a questo prodotto
File Dimensione Formato  
Siracusano_Sulfated-titania_2017.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 545.81 kB
Formato Adobe PDF
545.81 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/994934
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 12
social impact