Detection of hydrogen permeation through pure iron with light-addressable potentiometric sensor

Miyamoto Ko-Ichiro, Kaneko Manato, Wang Mengyun, Carl Frederik Benedikt Werner, Yoshinobu Tatsuo

研究成果: Article査読

抄録

A light-addressable potentiometric sensor (LAPS) is a semiconductor-based chemical sensor, in which the measurement area is defined by a probe light illuminating the sensor plate. In this study, a novel method to detect hydrogen permeation through metal was proposed using a measurement system, in which a LAPS was combined with a micro-volume measurement cell. The sensing surface of the LAPS was placed in the vicinity of the hydrogen exit surface of an iron sheet to form the micro-volume cell. The cell was filled with a Na2HPO4 solution, and then the pH change of the solution due to production of protons during the electrochemical hydrogen permeation was detected. After loading hydrogen atoms from the hydrogen entry side into the iron sheet, the photocurrent – bias voltage characteristics of the LAPS showed a shift indicating production of protons. The result suggested the possibility of applying the LAPS to visualization of hydrogen permeation sites on the metal surface.

本文言語English
ページ(範囲)1330-1332
ページ数3
ジャーナルIsij International
61
4
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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