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

Abstract

Core-shell nanostructure electrode (TiO2@C) for oxygen reduction reaction is prepared with TiO2 nanoparticles at 900 degrees C in a methane atmosphere. The TiO2@C supported Pt catalyst (Pt/TiO2@C) contains Pt nanoparticles on TiO2@C nanostructure electrodes consisting of TiO2 as a core and carbon as a shell. In the accelerated stability test, the Pt/TiO2@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. (C) 2012 Elsevier B.V. All rights reserved.