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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4938

Title: Comparative surface electrochemistry of Co and Co3O4 nanoparticles: nitrite as an analytical probe
Authors: Adekunle, AS
Ozoemena, KI
Keywords: Cobalt nanoparticles
Cobalt oxide nanoparticles
Electron transport
Impedance spectroscopy
Nitrite oxidation
Electrochemical science
Issue Date: Dec-2010
Publisher: Electrochemical Science Group
Series/Report no.: Workflow request;6133
Abstract: This study described the decoration of edge plane pyrolytic graphite electrode (EPPGE) with synthesised cobalt and cobalt oxide nanoparticles. The modified electrode was characterised by techniques such as TEM, FESEM, XRD, EDS, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The EPPGE-Co demonstrated enhanced electron transport and catalytic efficiency towards nitrite oxidation at pH 7.4 compared with the other electrodes studied. The catalytic rate constant (K) obtained at the EPPGE-Co for nitrite at pH 7.4 is 2.32 x 106 cm3mol-1s-1 while the limits of detection (LoD = 3.3 d/m) is 7.3 x 10-7 M.
Description: Copyright: 2010 Electrochemical Science Group.
URI: http://www.electrochemsci.org/papers/vol5/5121972.pdf
ISSN: 1452-3981
Appears in Collections:Nanotechnology
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General science, engineering & technology

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