Solid-state amperometric hydrogen sensor using Pt/C/Nafion composite electrodes prepared by a hot-pressed method

Yu Chuan Liu, Bing Joe Hwang, Iou Jeng Tzeng

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this study, hydrogen was sensed on Pt/C/Nafion composite electrodes prepared by a hot-pressed method. The results reveal that the sensitivity of the electrode increases with an increase of Pt loading. At a Pt loading of 3.0 mg/cm2, the sensitivities of the electrodes treated by direct wetting and indirect wetting methods are 0.263 and 0.716 μA/ppm, respectively, in the H2 concentration range of 1260-5250 ppm. This indicates that indirect wetting is a better method for moistening the hydrophobic electrode. Generally, both the response time and the recovery time decrease with increasing both the hydrogen concentration and the Pt loading. The electrode prepared in this study has the advantage of a higher catalytic surface area, which results in a sensitivity 50 times higher than that of electrodes prepared by other methods at the same Pt loading. Meanwhile, a sensing model is proposed to illustrate the sensing phenomenon.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume149
Issue number11
DOIs
Publication statusPublished - Nov 2002
Externally publishedYes

Fingerprint

Hydrogen
solid state
Electrodes
composite materials
electrodes
Wetting
sensors
Sensors
Composite materials
hydrogen
wetting
sensitivity
perfluorosulfonic acid
recovery
Recovery

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Solid-state amperometric hydrogen sensor using Pt/C/Nafion composite electrodes prepared by a hot-pressed method. / Liu, Yu Chuan; Hwang, Bing Joe; Tzeng, Iou Jeng.

In: Journal of the Electrochemical Society, Vol. 149, No. 11, 11.2002.

Research output: Contribution to journalArticle

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