Core–shell nanostructure supported Pt catalyst with improved electrocatalytic stability in oxygen reduction reaction

Abstract Core–shell nanostructure electrode (TiO 2 @C) for oxygen reduction reaction is prepared with TiO 2 nanoparticles at 900 °C in a methane atmosphere. The TiO 2 @C supported Pt catalyst (Pt/TiO 2 @C) contains Pt nanoparticles on TiO 2 @C nanostructure electrodes consisting of TiO 2 as a core and carbon as a shell. In the accelerated stability test, the Pt/TiO 2 @C exhibits a superior ORR stability to conventional carbon supported Pt catalyst. It is likely that the enhanced catalytic properties of the nanostructure supported Pt catalyst may be due to graphite-like carbon and an improved electronic conductivity of the core–shell nanostructure.