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

doi:10.1007/s10008-011-1616-0

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

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	2055-2059
Number of pages	5
Journal	Journal of Solid State Electrochemistry
Volume	16
Issue number	6
DOIs	https://doi.org/10.1007/s10008-011-1616-0
Publication status	Published - Jun 2012

All Science Journal Classification (ASJC) codes

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

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10.1007/s10008-011-1616-0

Cite this

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title = "Proton conduction properties of nano-titania modified by sulfuric acid impregnation",

abstract = "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.",

author = "Takaaki Sakai and Kim, {Seok Jun} and Satoshi Kajitani and Hamagami, {Jun Ichi} and Hiroyuki Oda and Maki Matsuka and Tatsumi Ishihara and Hiroshige Matsumoto",

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T1 - Proton conduction properties of nano-titania modified by sulfuric acid impregnation

AU - Sakai, Takaaki

AU - Kim, Seok Jun

AU - Kajitani, Satoshi

AU - Hamagami, Jun Ichi

AU - Oda, Hiroyuki

AU - Matsuka, Maki

AU - Ishihara, Tatsumi

AU - Matsumoto, Hiroshige

PY - 2012/6

Y1 - 2012/6

N2 - 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.

AB - 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.

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

Abstract

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