Hydrogen accumulation in surface of perfluorosulfonic acid membranes after γ-ray irradiation using elastic recoil detection techniques

Toru Adachi, Shinji Nagata, Naofumi Ohtsu, Bun Tsuchiya, Kentaro Toh, Tatsuo Shikama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Electrical conductivity measurements and elastic recoil detection (ERD) analysis were carried our on perfluorosulfonic acid membranes that were irradiated by 60Co γ-ray. Maximum electrical conductivity of irradiated specimen was obtained at 40-60°C, though that of unirradiated specimen increased with increasing temperature. And 4000-fold higher conductivity was obtained in irradiated membrane at 40°C under dry condition. ERD analysis indicated that hydrogen concentration of the irradiated membrane is 1.5-fold higher than that of the unirradiated specimen. It is considered that the γ-ray generates a lot of site that can trap hydrogen and the trapped hydrogen cannot easily move. As the results, irradiated membrane retains more hydrogen than unirradiated one and the electrical conductivity of irradiated membrane is higher than that of unirradiated membrane in any conditions. γ-Ray irradiation is effective for improving the electrical conductivity of proton-conducting membranes.

Original languageEnglish
Pages (from-to)6385-6387
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number8 A
DOIs
Publication statusPublished - 2006 Aug 4

Keywords

  • ERD
  • Hydrogen
  • Perfluorosulfonic acid membranes
  • Proton conduction
  • γ-ray irradiation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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