Adekunle, Abolanle SaheedOzoemena, Kenneth I.2011-03-082011-03-082010-12Adekunle, AS & Ozoemena, KI 2010, 'Voltammetric and impedimetric properties of nano-scaled y--Fe2O3 catalysts supported on multi-walled carbon nanotubes : catalytic detection of dopamine', International Journal of Electrochemical Science, vol. 5, no. 12, pp. 1726-1742. [http://www.electrochemsci.org]1452-3981http://hdl.handle.net/2263/15998The electron transfer and electrocatalytic proiperties of iron oxide nanoparticle (-Fe2O3) catalysts supported on MWCNTs are described. The MWCNT-Fe2O3 and its electrodes were successfully characterised with FESEM, HRTEM, XRD, EDX, cyclic voltammetry and electrochemical impedance spectroscopy. The MWCNT-Fe2O3 based electrodes demonstrated fastest electron transport and current response towards DA compared to other electrodes studied, giving a catalytic rate constant of 16.4 x 105 cm3mol-1s-1, sensitivity of 0.026 AM-1 and limit of detection of 3.3 x 10-7 M. The electrode may be potentially useful for the detection of DA in real drug sample analysis.en© 2010 by ESGMWCNTsIron oxide nanoparticlesElectrochemical impedance spectroscopyDopamine detectionVoltammetryElectrocatalysisArticle