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

Norio Miura, Tatsuro Harada, Noboru Yamazoe

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1215-1219
Number of pages5
JournalJournal of the Electrochemical Society
Volume136
Issue number4
DOIs
Publication statusPublished - Jan 1 1989

Fingerprint

Protons
Hydrogen
conductors
solid state
protons
probes
output
sensors
Sensors
hydrogen
Positive temperature coefficient
Electrodes
electrodes
air
Air
humidity
Atmospheric humidity
acids
Acids
Electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Sensing Characteristics and Working Mechanism of Four-Probe Type Solid-State Hydrogen Sensor Using Proton Conductor. / Miura, Norio; Harada, Tatsuro; Yamazoe, Noboru.

In: Journal of the Electrochemical Society, Vol. 136, No. 4, 01.01.1989, p. 1215-1219.

Research output: Contribution to journalArticle

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