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

Abstract

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.