Characteristics of Pd/Nafion electrodes prepared by an impregnation-reduction method in sensing hydrogen

Bing Joe Hwang, Yu Chuan Liu, Wen Cheng Hsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The influences of reductant concentration and Pd loading on the response and recovery times and the sensitivity in detecting hydrogen of Pd/Nafion electrodes prepared by an impregnation-reduction method were investigated in this study. The Pd/Nafion electrodes with a Pd loading of 6.90 mg/cm2, obtained at 0.006 M Pd(NH3)4Cl2 and 0.06 M NaBH4, show the maximum sensitivity of 0.0519 μA/ppm in the H2 concentration range 0-4410 ppm. However, the Pd/Nafion electrodes with a Pd loading of 11.42 mg/cm2, obtained at 0.01 M Pd(NH3)4Cl2 and 0.06 M NaBH4, show the fastest response and recovery speed in sensing hydrogen. Generally, the response time decreases with an increase of the hydrogen concentration, but the recovery time increases with an increase of the hydrogen concentration. A sensing model is also proposed to illustrate the sensing phenomenon.

Original languageEnglish
Pages (from-to)274-279
Number of pages6
JournalJournal of Solid State Electrochemistry
Volume5
Issue number4
DOIs
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Impregnation-reduction method
  • Palladium/Nafion
  • Response and recovery times
  • Sensitivity

ASJC Scopus subject areas

  • Electrochemistry

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