Superior catalytic performance and CO tolerance of Ru@Pt/C-TiO2 electrocatalyst toward methanol oxidation reaction

Efficient removal of CO species binding with Pt active sites during methanol oxidation reaction (MOR) is vital for an excellent electrocatalyst. In this paper, well-controlled Ru@Pt/C-TiO2 with much weakened CO adsorption was prepared as MOR electrocatalyst. The nanostructure shows enhanced electroactivity in MOR with peak current density of 1.08 mA/cm(2), significantly larger than that of Ru@Pt/C (0.76 mA/cm(2)), Pt/C-TiO2 (0.66 mA/cm(2)) and Pt/C (0.34 mA/cm(2)). The stability and CO tolerance of Ru@Pt/C-TiO2 are also superior to that of Ru@ Pt/C, Pt/C-TiO2 and Pt/C. This enhanced MOR performance is ascribed to bifunctional mechanism derived from TiO 2 and strong electronic interaction between Pt and Ru, C-TiO2 , weakening binding energy of CO adsorbed on Pt.