Electrocatalysis and determination of hydrazine compounds in liquid chromatography at a mixed-valent cobalt oxide/cyanocobaltate film electrode.


Journal Article

A glassy carbon electrode coated with an electrodeposited film of mixed-valent cobalt oxide/cyanocobaltate (CoO/CNCo) enabled hydrazine compounds to be catalytically oxidized at the greatly reduced overpotential and in a wide operational pH range (pH 2.0-7.0). Electrocatalytic activity at the CoO/CNCo modified electrode was evaluated with respect to solution pH, film thickness, supporting electrolyte ions, potential scan rate, operating potential, concentration dependence and other variables. The CoO/CNCo film electrode was completely compatible with a conventional reversed-phase liquid chromatographic (RP-LC) system. Practical RP-LC amperometric detection (RP-LCEC) of hydrazines was performed. A dynamic linear response range over three orders of magnitude and a detection limit at the pmol level were readily obtained. The CoO/CNCO film electrode exhibited excellent electrocatalytic stability in the flowing streams.

Full Text

Duke Authors

Cited Authors

  • Zhou, J; Wang, E

Published Date

  • June 1, 1993

Published In

Volume / Issue

  • 40 / 6

Start / End Page

  • 943 - 948

PubMed ID

  • 18965732

Pubmed Central ID

  • 18965732

International Standard Serial Number (ISSN)

  • 0039-9140

Digital Object Identifier (DOI)

  • 10.1016/0039-9140(93)80056-w


  • eng

Conference Location

  • Netherlands