Long-term stability of sulfated hydrous titania-based electrolyte for water electrolysis

Seok Jun Kim, Takaaki Sakai, Hiroyuki Oda, Yuji Okuyama, Yumi Mizutani, Jun Ichi Hamagami, Maki Matsuka, Tatsumi Ishihara, Hiroshige Matsumoto

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2 Citations (Scopus)


The long-term stability in water was investigated for an inorganic proton conductor based on sulfated hydrous titania electrolyte in water electrolysis. Heat treatment temperature in the range of 400-700 °C during synthesis of the material was chosen as the critical parameter for the conductivity and stability in water. Electric resistance of the membrane electrode assembly using the sulfated hydrous titania in water and pH were investigated by the effect of heat treatment temperature on the stability of conductivity and acid detachment. TG, Fourier transform infrared spectroscopy, and energy-dispersive X-ray analysis measurements were performed to understand the amount and state of the sulfate groups on the surface of sulfated hydrous titania. Heat treatment at 650 °C was found to obtain good conduction behavior for the sulfated hydrous titania and was confirmed to work for a stable water electrolysis.

Original languageEnglish
Pages (from-to)3587-3592
Number of pages6
JournalJournal of Solid State Electrochemistry
Issue number11
Publication statusPublished - Nov 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • General Materials Science
  • Electrical and Electronic Engineering
  • Electrochemistry


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