Cordless solid-state hydrogen sensor using proton-conductor thick film

Norio Miura, Tatsuro Harada, Youichi Shimizu, Noboru Yamazoe

    Research output: Contribution to journalArticlepeer-review

    42 Citations (Scopus)


    Potentiometric as well as amperometric solid-state gas sensors using a thick film (≈ 10 μm) of proton-conductor have been developed for detecting small amounts of hydrogen in air at room temperature. The sensor elements are composed of the following electrochemical cell: reference (or counter) electrode (Au or Pt) | proton-conductor thick film | sensing electrode (Pt). The thick film is formed on an alumina substrate by applying a paste of antimonic acid-polyvinyl alcohol mixture, mainly by means of a spin-coating method. The electromotive force of the potentiometric sensor varies logarithmically with H2 concentration, while the short-circuit current of the amperometric sensor is found to be proportional to H2 concentration. Both give a 90% response time of about 10 s at 30 °C.

    Original languageEnglish
    Pages (from-to)125-129
    Number of pages5
    JournalSensors and Actuators: B. Chemical
    Issue number1-6
    Publication statusPublished - Jan 1990

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Instrumentation
    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Electrical and Electronic Engineering
    • Materials Chemistry


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