One-dimensional proton conductor under high vapor pressure condition employing titanate nanotube

Masanori Yamada, Mingdeng Wei, Itaru Honma, Haoshen Zhou

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Metal oxides with the nano-structure, such as nano-porous, -sheet, -particle, and -tube, have been attracted for the functional materials on the future technology. Especially, one-dimensional (1D) metal oxide nanotubes are emerging as potentially useful materials. In this paper, we prepared the 1D proton conductor under high vapor pressure condition employing titanate (H2Ti3O7) nanotube (TNT). This metal oxide nanotube showed the proton conductivity of 5 × 10-4 S cm-1 at intermediate temperature (≤160 °C), fully saturated humidification (relative humidity of 100%), and high vapor pressure (6 atm) conditions. This conduction behavior in metal oxide nanotube is controlled by the liquid phase mediated charge transport (liquid-like mechanism). The proton conductor of 1D may have a potential not only for the fuel cell electrolytes operated at intermediate temperature conditions but also for various electrochemical devices. Furthermore, 1D proton conductor, such as TNT, might be used as the basic proton conductor to discuss the proton conductive mechanism.

Original languageEnglish
Pages (from-to)1549-1552
Number of pages4
JournalElectrochemistry Communications
Volume8
Issue number9
DOIs
Publication statusPublished - 2006 Sep 1
Externally publishedYes

Keywords

  • Metal oxide nanotube
  • Nano-structure
  • Proton conductive electrolyte
  • Proton conductivity
  • Titanate

ASJC Scopus subject areas

  • Electrochemistry

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