Development of high protonic conductors based on amorphous mesoporous alumina

Hangyan Shen, Hideki Maekawa, Junichi Kawamura, Tsutomu Yamamura

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The proton conductivity of amorphous mesoporous alumina synthesized with various pore sizes was examined. A systematic dependence of conductivity upon pore size was observed, with increased conductivity as the pore size increased. The highest conductivity, 0.004 S·cm- 1, was obtained at 303 K and 90% relative humidity (RH). The RH dependence of the water content was determined. Proton mobility was investigated by 1H-NMR. At 30% RH, the width of the 1H-NMR line decreased with increasing pore size, suggesting an increase in proton mobility. At 90% RH, the increase of the 1H-NMR sharp peak is accordant with the increase in conductivity as the pore size increased.

Original languageEnglish
Pages (from-to)2403-2406
Number of pages4
JournalSolid State Ionics
Volume177
Issue number26-32 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Oct 31

Keywords

  • Amorphous mesoporous alumina
  • Pore size dependence
  • Proton conductivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Development of high protonic conductors based on amorphous mesoporous alumina'. Together they form a unique fingerprint.

Cite this