title: Convenient immobilization of Pt-Sn bimetallic catalysts on nitrogen-doped carbon nanotubes for direct alcohol electrocatalytic oxidation.
abstract: Pt-Sn alloy nanoparticles were conveniently immobilized on nitrogen-doped carbon nanotubes (NCNTs) through microwave-assisted ethylene glycol reduction. The nanoparticles have a narrow particle size distribution with the average particle size around 3 nm as measured by transmission electron microscopy and x-ray diffraction. The binding energy of metallic Sn passively shifts due to the charge transfer from Sn to Pt, as revealed by x-ray photoelectron spectroscopy. In comparison with the commercial Pt/C catalyst, Pt/NCNT presents a clear increase in activity for alcohol electro-oxidation due to the improved support, while the bimetallic Pt-Sn/NCNT has even higher activity owing to the alloying of Pt with Sn. Both Pt-Sn/NCNT and Pt/NCNT catalysts exhibit competitive long-term stability to Pt/C catalyst. The low cost, simple preparation and superior electrocatalytic performance indicate the great potential of Pt-Sn/NCNT in direct alcohol fuel cells.
authors: Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People's Republic of China. wangxzh@nju.edu.cn
authors: Xizhang
authors: X
authors: Wang
authors: Hua
authors: H
authors: Xue
authors: Lijun
authors: L
authors: Yang
authors: Huakai
authors: H
authors: Wang
authors: Pengyuan
authors: P
authors: Zang
authors: Xintai
authors: X
authors: Qin
authors: Yangnian
authors: Y
authors: Wang
authors: Yanwen
authors: Y
authors: Ma
authors: Qiang
authors: Q
authors: Wu
authors: Zheng
authors: Z
authors: Hu
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002384:Catalysis; D004563:Electrochemistry; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D009584:Nitrogen / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D014001:Tin / Q000737:chemistry*
chemical_list: D000497:Alloys; D037742:Nanotubes, Carbon; D010984:Platinum; D014001:Tin; D009584:Nitrogen