Nafion-based solid-state gas sensors: Pt/Nation electrodes prepared by an impregnation-reduction method in sensing oxygen

Bing Joe Hwang, Yu Chuan Liu, Wen Cheng Hsu

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15 Citations (Scopus)


The influences of the reductant concentration of NaBH4 and the quantity of Pt loading on the active surface area and the sensitivity of the Pt/Nafion electrodes prepared by an impregnation-reduction method in detecting oxygen were investigated in this study. The Pt/Nafion electrodes with a Pt loading of 4.99 mg/cm2, obtained at 0.0107 M Pt(NH3)4Cl2 and 0.06 M NaBH4, show maximum sensitivities of 0.0528 μA/ppm and 0.0538 μA/ppm obtained in O2 concentration regions of 0-5000 and 5000-50 000 ppm, respectively. A sensing model was also proposed to illustrate the sensing phenomenon.

Original languageEnglish
Pages (from-to)378-385
Number of pages8
JournalJournal of Solid State Electrochemistry
Issue number6
Publication statusPublished - 1998
Externally publishedYes



  • Impregnation-reduction method Pt/Nafion
  • Sensitivity

ASJC Scopus subject areas

  • Electrochemistry

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