Electrochemical oxidation of methanol on Pt nanoparticles composited MnO2 nanowire arrayed electrode

By use of the membrane-template synthesis route, MnO2 nanowire arrayed electrodes are successfully synthesized by means of the anodic deposition technique. The Pt nanoparticles composited MnO2 nanowire arrayed electrodes (PME) are obtained through depositing Pt on MnO2 nanowire arrayed electrode by cathode deposition technique. For comparison of electrochemical performance, Pt nanowire arrayed electrodes which have the same amount of Pt with PME are also prepared. The electro-oxidation of methanol on PME and Pt nanowire arrayed electrodes is investigated at room temperature by cyclic voltammetry, which show that about 110 mV decreased overpotential and 2.1-fold enhanced votammetric current are achieved on PME. The chronoamperometry result demonstrates that the resistance to carbon monoxide for PME is improved. (c) 2007 Elsevier B.V. All rights reserved.