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

B. J. Hwang, Y. C. Liu, W. C. Hsu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The influences of reductant concentration and platinum loading on the response, recovery time and sensitivity of Pt/Nafion® electrodes prepared by an impregnation-reduction method for detecting hydrogen were investigated. Electrodes with a Pt loading of 4.99 mg cm-2 obtained using 0.0107 M Pt(NH3)4Cl2 and 0.06 M NaBH4, showed a maximum sensitivity of 0.0744 μA ppm-1 in the H2 concentration range of 0∼4508 ppm. However, electrodes with a Pt loading of 7.40 mg cm-2 made using 0.015 M Pt(NH3)4Cl2 and 0.06 M NaBH4 showed the fastest response and recovery. Generally, both the response and the recovery time decreased with increasing hydrogen concentration. A model is proposed to illustrate the sensing phenomenon.

Original languageEnglish
Pages (from-to)69-75
Number of pages7
JournalJournal of New Materials for Electrochemical Systems
Volume4
Issue number2
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Impregnation-reduction method
  • Pt/Nafion®
  • Response and recovery time
  • Sensitivity

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

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