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

研究成果: 雜誌貢獻文章同行評審

20 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
期刊Journal of the Electrochemical Society
149
發行號11
DOIs
出版狀態已發佈 - 十一月 2002
對外發佈Yes

ASJC Scopus subject areas

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

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