Characteristics of Pd/Nafion oxygen sensor modified with polypyrrole by chemical vapor deposition

Yu Chuan Liu, Bing Joe Hwang, Wen Cheng Hsu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this study, Pd/Nafion electrodes were prepared by impregnation-reduction methods in sensing oxygen. To prolong the electrode's life in practical use, a polypyrrole (PPy) film was chemically deposited onto the Pd/Nafion electrode. The sensitivities of PPy-modified Pd/Nafion electrodes are 0.00671 and 0.0117 μA/ppm obtained in O2 concentration regions of 0-5000 and 5000-50,000 ppm, respectively. Generally, the response time and the recovery time decreases and increases significantly with increasing O2 concentrations. After continuous aging tests for 48 h, the sensitivities of the Pd/Nafion and the PPy-modified Pd/Nafion electrodes decrease by 97% and 53%, respectively.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalJournal of Solid State Electrochemistry
Volume6
Issue number5
DOIs
Publication statusPublished - Jun 2002
Externally publishedYes

Keywords

  • Aging
  • Chemical vapor deposition
  • Oxygen
  • PPy-modified Pd/Nafion electrode

ASJC Scopus subject areas

  • Electrochemistry

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