Electro-catalytic oxidation of methane at multi-walled carbon nanotubes-Nafion/nickel hydroxide modified nickel electrode

Jie Qiao, Shengnan Tang, Yanni Tian, Shaomin Shuang, Chuan Dong*, Martin M F CHOI

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

A novel chemical modified nickel (Ni) electrode based on multi-walled carbon nanotubes (MWCNTs), Nafion film and nickel hydroxide has been successfully fabricated for methane (CH4) detection at ambient conditions. The morphology of the MWCNTs-Nafion/Ni(OH)2 film was characterized by transmission electron microscopy and the electrochemical properties of the Ni modified electrode were studied by cyclic voltammetry. The MWCNTs-Nafion/Ni(OH)2-Ni electrode showed good catalytic effect on the oxidation of CH4 in 1.0 M NaOH. In addition, the modified electrode was free from nitrogen and oxygen interferences. When differential pulse voltammetry was applied to the MWCNTs-Nafion/Ni(OH)2-Ni electrode, a good linear relationship between the oxidation peak current (i) and CH4 concentration (Cmethane) was obtained: i = 1.841Cmethane + 46.25, where i is in μA and Cmethane is in 0.0-16.0% (v/v). The relative standard deviation for detection of 3.0% (v/v) CH4 was 1.80% (n = 5). The proposed Ni modified electrode is anticipated to provide a promising technique to detect CH4 at ambient conditions.

Original languageEnglish
Pages (from-to)402-407
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume138
Issue number2
DOIs
Publication statusPublished - 6 May 2009

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

User-Defined Keywords

  • Methane
  • Multi-walled carbon nanotubes
  • Nafion
  • Nickel modified electrode

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