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.
|Number of pages||8|
|Journal||Journal of Solid State Electrochemistry|
|Publication status||Published - 1998|
- Impregnation-reduction method Pt/Nafion
ASJC Scopus subject areas