Proton conduction properties of nano-titania modified by sulfuric acid impregnation

Takaaki Sakai, Seok Jun Kim, Satoshi Kajitani, Jun Ichi Hamagami, Hiroyuki Oda, Maki Matsuka, Tatsumi Ishihara, Hiroshige Matsumoto

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5 Citations (Scopus)


The proton conduction properties of sulfuric acidmodified nano-titania prepared by impregnation method were investigated. The proton conductivity of sulfuric acid-modified nano-titania was almost the same as that of hydrous sulfated nano-titania investigated in our previous work when the amount of adsorbed sulfate groups was almost the same. The highest conductivity was obtained at an adsorbed sulfate group amount of 0.42 mmol/g, not 0.97 mmol/g. This result indicates that the enhancement of conductivity with increasing amount of adsorbed sulfate groups is limited. This might be attributable to insufficient water molecule adsorption on the Ti 4+ site coordinated with a bidentate sulfate group due to the prevention by excess sulfuric acid.

Original languageEnglish
Pages (from-to)2055-2059
Number of pages5
JournalJournal of Solid State Electrochemistry
Issue number6
Publication statusPublished - Jun 2012

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering


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