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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5816

Title: Electron transport and electrocatalytic properties of MWCNT/nickel nanocomposites: hydrazine and diethylaminoethanethiol as analytical probes
Authors: Adekunle, AS
Ozoemena, KI
Keywords: Multi-walled carbon nanotube
Nickel
Nickel oxide nanoparticles
Nanoparticles
Cyclic voltammetry
Impedance spectroscopy
Hydrazine
Issue Date: Jun-2010
Publisher: Elsevier
Citation: Adekunle, AS and Ozoemena, KI. 2010. Electron transport and electrocatalytic properties of MWCNT/nickel nanocomposites: hydrazine and diethylaminoethanethiol as analytical probes. Journal of Electroanalytical Chemistry, vol. 654(1), pp 41-49
Series/Report no.: Workflow;6135
Abstract: This work describes the electron transport and electrocatalytic properties of chemically-synthesized nickel (Ni) and nickel oxide (NiO) nanoparticles supported on multi-walled carbon nanotubes (MWCNT) platforms. Successful modification of the electrodes with the Ni and NiO nanoparticles was confirmed by techniques such as FTIR, FESEM, HRSEM, TEM, XRD, EDX and cyclic voltammetry (CV). The electrocatalytic oxidation of DEAET and hydrazine on the modified electrodes was investigated using CV electrochemical impedance spectroscopy (EIS) and discussed. Results showed that EPPGE-MWCNT-Ni electrode gave the best electro-oxidation response towards DEAET and hydrazine. The catalytic rate constant and the limit of detection of the electrode to DEAET and hydrazine were 5.93 x 10 9 cm 3 mol -1 s -1 (0.87 µM) and 7.67 x 10 9 cm 3 mol -1 s -1 (0.29 µM), respectively. The electrochemical Gibbs free energy change due to adsorption ( G o ) for the EPPGE-MWCNT-Ni in DEAET and hydrazine were estimated as –18.14 and –17.21 kJmol -1 , respectively. The electrode has proven to be a potential electrochemical sensor for DEAET and hydrazine.
Description: Copyright: 2010 Elsevier. This is an ABSTRACT ONLY.
URI: http://www.sciencedirect.com/science/article/pii/S157266571000175X
http://hdl.handle.net/10204/5816
ISSN: 1572-6657
Appears in Collections:Analytical science
General science, engineering & technology

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