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- Title
Proton conduction properties of nano-titania modified by sulfuric acid impregnation.
- Authors
Sakai, Takaaki; Kim, Seok-Jun; Kajitani, Satoshi; Hamagami, Jun-ichi; Oda, Hiroyuki; Matsuka, Maki; Ishihara, Tatsumi; Matsumoto, Hiroshige
- Abstract
The proton conduction properties of sulfuric acid-modified 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 site coordinated with a bidentate sulfate group due to the prevention by excess sulfuric acid.
- Subjects
SOLID state proton conductors; TITANIUM dioxide; SULFATES; ADSORPTION (Chemistry); SULFURIC acid
- Publication
Journal of Solid State Electrochemistry, 2012, Vol 16, Issue 6, p2055
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-011-1616-0