Electrochimica Acta, Vol.139, 250-255, 2014
Cobalt nano-sheet supported on graphite modified paper as a binder free electrode for peroxide electrooxidation
A novel and binder free Co@graphite/paper electrode is prepared by electrodeposition Co nano-sheet on the surface of a graphite layer modified paper substrate. The morphology and phase structure of the Co@graphite/paper electrode are characterized by scanning electron microscopy equipped with energy dispersive X-ray spectrometer, transmission electron microscope and X-ray diffractometer. The catalytic activity of the Co@graphite/paper electrode for H2O2 electrooxidation is investigated by means of cyclic voltammetry and chronoamperometry. The catalyst combines tightly with the paper and exhibits a good stability. The oxidation current density reaches to 580 mA cm(-2) in 2 mol dm(-3) NaOH and 0.5 mol dm(-3) H2O2 at 0.5 V. Besides, we illustrate the reaction mechanization of the H2O2 electrooxidation on the Co film. (C) 2014 Elsevier Ltd. All rights reserved.