MnO2 nanosheets as a high-efficiency electrocatalyst for H2O2 reduction in alkaline medium

摘要

Considering the good ability of MnO2 for the breakage of the HO-OH bond in H2O2, we employed C@TiO2 nanowire supported MnO2 as a novel catalyst for H2O2 electroreduction. The morphology and phase structure of the MnO2/C@TiO2 electrode are characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffractometry. The catalytic activity of the MnO2/C@TiO2 electrode for H2O2 electroreduction is investigated by means of cyclic voltammetry and chronoamperometry. The catalyst exhibits a high catalytic activity and good stability in the electrochemical reaction process. The oxidation current density is higher than 200 mA cm(-2) at -0.7 V in 1.6 mol dm (3) H2O2. The popular price, abundant reserves, and promising electrocatalytic performance make it a viable catalyst for H2O2 electroreduction.