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Chunhui Tan,Juhui Sa,Feipeng Cai,Bo Jiang,Gai Yang,Bo Wang,Jinhua Gao,Hua Chen,Xianzhong Qin 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.2
PtRu nanoparticles (NPs) supported on acid treated multiwall carbon nanotubes (Pt1Ru1/ MWCNTs) were prepared by a modified polyol method without adding any other surfactant or protective agent. The structural and compositional properties of the as-obtained samples were characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and X-ray photoelectron (XPS) spectroscopy. The electrocatalytic performance of the catalyst was evaluated by cyclic voltammetry (CV), CO stripping voltammetry and chronoamperometry, indicating a high catalytic activity, excellent CO tolerance and stability for methanol oxidation. Interestingly, a series of accurate controllable experiments have been designed to explore the enhancement mechanism of Pt1Ru1/MWCNTs for methanol oxidation reaction. Most importantly, Pt1Ru1/MWCNTs composites were used as an anode catalyst in the direct methanol fuel cells (DMFCs) exhibiting outstanding power density (126.1 mW/cm2) 1.7 times higher than that of the commercial catalyst of Pt1Ru1/C (74.1 mW/cm2Þ)(E-TEK).