Sensing Characteristics and Working Mechanism of Four-Probe Type Solid-State Hydrogen Sensor Using Proton Conductor

Norio Miura, Tatsuro Harada, Noboru Yamazoe

    研究成果: Contribution to journalArticle査読

    33 被引用数 (Scopus)

    抄録

    A solid-state proton conductor (antimonic acid) sensor capable of detecting dilute hydrogen in air at room temperature has been developed. The sensor element has a four-probe type structure with two inner Ag probes and two outer Pt electrodes. With the outer electrodes short-circuited, the potential difference between the two inner probes was used as a signal output. It was found that the output was not only proportional to hydrogen concentration (up to 1.3%) in air, but also independent of relative humidity (7-90%). The 90% response time was as short as 20s to 0.2% H2 at 25°C. The signal output had a small positive temperature coefficient (ca. 2 mV/°C) in the range from 10° to 35°C. The sensor was fairly stable during the test period of about one month. A hydrogen sensing mechanism was proposed and discussed with supporting evidence about electric potential profiles inside the proton conductor.

    本文言語英語
    ページ(範囲)1215-1219
    ページ数5
    ジャーナルJournal of the Electrochemical Society
    136
    4
    DOI
    出版ステータス出版済み - 1 1 1989

    All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • 再生可能エネルギー、持続可能性、環境
    • 表面、皮膜および薄膜
    • 電気化学
    • 材料化学

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