Electrochemical determination of hydrogen sulfide at carbon nanotube modified electrodes

  • Lawrence N
  • Deo R
  • Wang J
  • 46

    Readers

    Mendeley users who have this article in their library.
  • 165

    Citations

    Citations of this article.

Abstract

Carbon nanotube (CNT) modified glassy carbon electrodes exhibiting a strong and stable electrocatalytic response towards sulfide are described. A substantial (400 mV) decrease in the overvoltage of the sulfide oxidation reaction (compared to ordinary carbon electrodes) is observed using the CNT-modified electrode, with oxidation starting at ca. -0.3 V (versus Ag/AgCl; pH 7.4). The CNT-coated electrodes thus allow highly sensitive, low potential (+0.1 V), stable amperometric sensing. A wide linear dynamic range (1.25-112.5 μM) was achieved with a detection limit of 0.3 μM (9 ppb). The enhance sensitivity is coupled to an improved stability. Such ability of carbon nanotubes to promote the sulfide electron-transfer reaction suggests great promise for miniaturized sensors for hydrogen sulfide. © 2004 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • ARC
  • Carbon nanotubes
  • Chemical vapor deposition
  • Electrocatalytic
  • Glassy carbon
  • Sulfide

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free