Ikpo, CONjomo, NOzoemena, KIWaryo, TOlowu, RAMasikini, MBaleg, AAJahed, NBaker, PGLIwuoha, EI2014-05-222014-05-222013-01Ikpo, C.O, Njomo, N, Ozoemena, K.I, Waryo, T, Olowu, R.A, Masikini, M, Baleg, A.A, Jahed, N, Baker, P.G.L and Iwuoha, E.I. 2013. Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode. Nano Hybrids, vol. 3, pp 1-232234-9871http://www.scientific.net/NH.3.1http://hdl.handle.net/10204/7426Copyright: 2013 Trans tech publications. This is ABSTRACT ONLY. The definitive version is published in Nano Hybrids, vol. 3, pp 1-23The electrochemical dynamics of a film of FeCo nanoparticles were studied on a glassy carbon electrode (GCE). The film was found to be electroactive in 1 M LiClO4 containing 1:1 v/v ethylene carbonate – dimethyl carbonate electrolyte system. Cyclic voltammetric experiments revealed a diffusion-controlled electron transfer process on the GCE/FeCo electrode surface. Further interrogation on the electrochemical properties of the FeCo nanoelectrode in an oxygen saturated 1 M LiClO4 containing 1:1 v/v ethylene-carbonate-dimethyl carbonate revealed that the nanoelectrode showed good response towards the electro-catalytic reduction of molecular oxygen with a Tafel slope of about 120 mV which is close to the theoretical 118 mV for a single electron transfer process in the rate limiting step; and a transfer Coefficient (α) of 0.49. The heterogeneous rate constant of electron transfer (ket), exchange current density (io) and time constant (τ) were calculated from data obtained from electrochemical impedance spectroscopy and found to have values of 2.3 x 10-5 cm s-1, 1.6 x 10-4 A cm-2 and 2.4 x 10-4 s rad-1, respectively.enChemically modified electrodesLiClO4Ironcobalt nanoparticlesCyclic voltammetryElectrochemical impedance spectroscopyDiffusion coefficientCharge transfer resistanceEthylene carbonate-dimethyl carbonateArticleIkpo, C., Njomo, N., Ozoemena, K., Waryo, T., Olowu, R., Masikini, M., ... Iwuoha, E. (2013). Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode. http://hdl.handle.net/10204/7426Ikpo, CO, N Njomo, KI Ozoemena, T Waryo, RA Olowu, M Masikini, AA Baleg, N Jahed, PGL Baker, and EI Iwuoha "Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode." (2013) http://hdl.handle.net/10204/7426Ikpo C, Njomo N, Ozoemena K, Waryo T, Olowu R, Masikini M, et al. Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode. 2013; http://hdl.handle.net/10204/7426.TY - Article AU - Ikpo, CO AU - Njomo, N AU - Ozoemena, KI AU - Waryo, T AU - Olowu, RA AU - Masikini, M AU - Baleg, AA AU - Jahed, N AU - Baker, PGL AU - Iwuoha, EI AB - The electrochemical dynamics of a film of FeCo nanoparticles were studied on a glassy carbon electrode (GCE). The film was found to be electroactive in 1 M LiClO4 containing 1:1 v/v ethylene carbonate – dimethyl carbonate electrolyte system. Cyclic voltammetric experiments revealed a diffusion-controlled electron transfer process on the GCE/FeCo electrode surface. Further interrogation on the electrochemical properties of the FeCo nanoelectrode in an oxygen saturated 1 M LiClO4 containing 1:1 v/v ethylene-carbonate-dimethyl carbonate revealed that the nanoelectrode showed good response towards the electro-catalytic reduction of molecular oxygen with a Tafel slope of about 120 mV which is close to the theoretical 118 mV for a single electron transfer process in the rate limiting step; and a transfer Coefficient (α) of 0.49. The heterogeneous rate constant of electron transfer (ket), exchange current density (io) and time constant (τ) were calculated from data obtained from electrochemical impedance spectroscopy and found to have values of 2.3 x 10-5 cm s-1, 1.6 x 10-4 A cm-2 and 2.4 x 10-4 s rad-1, respectively. DA - 2013-01 DB - ResearchSpace DP - CSIR KW - Chemically modified electrodes KW - LiClO4 KW - Ironcobalt nanoparticles KW - Cyclic voltammetry KW - Electrochemical impedance spectroscopy KW - Diffusion coefficient KW - Charge transfer resistance KW - Ethylene carbonate-dimethyl carbonate LK - https://researchspace.csir.co.za PY - 2013 SM - 2234-9871 T1 - Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode TI - Electrokinetic and impedimetric dynamics of FeCo-nanoparticles on glassy carbon electrode UR - http://hdl.handle.net/10204/7426 ER -