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

• DOI: 10.1016/j.apsusc.2018.12.211
• Publication Date: 2018-12-24T16:42:19Z
• Authors: Yajing Wang; Jiankang Wang; Guokang Han; Chunyu Du; Yongrong Sun; Lei Du; Meichen An; Geping Yin; Yunzhi Gao; Ying Song
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract 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/cm2, significantly larger than that of Ru@Pt/C (0.76 mA/cm2), Pt/C-TiO2 (0.66 mA/cm2) and Pt/C (0.34 mA/cm2). 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 TiO2 and strong electronic interaction between Pt and Ru, C-TiO2, weakening binding energy of CO adsorbed on Pt.