title: Facile Synthesis of Quasi-One-Dimensional Au/PtAu Heterojunction Nanotubes and Their Application as Catalysts in an Oxygen-Reduction Reaction.
abstract: An intermediate-template-directed method has been developed for the synthesis of quasi-one-dimensional Au/PtAu heterojunction nanotubes by the heterogeneous nucleation and growth of Au on Te/Pt core-shell nanostructures in aqueous solution. The synthesized porous Au/PtAu bimetallic nanotubes (PABNTs) consist of porous tubular framework and attached Au nanoparticles (AuNPs). The reaction intermediates played an important role in the preparation, which fabricated the framework and provided a localized reducing agent for the reduction of the Au and Pt precursors. The Pt7 Au PABNTs showed higher electrocatalytic activity and durability in the oxygen-reduction reaction (ORR) in 0.1 M HClO4 than porous Pt nanotubes (PtNTs) and commercially available Pt/C. The mass activity of PABNTs was 218 % that of commercial Pt/C after an accelerated durability test. This study demonstrates the potential of PABNTs as highly efficient electrocatalysts. In addition, this method provides a facile strategy for the synthesis of desirable hetero-nanostructures with controlled size and shape by utilizing an intermediate template.
authors.affiliation: State Key Laboratory of Agriculture Microbiology, College of Science, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070 (P.R. China).
authors.forename: Kai
authors.initials: K
authors.lastname: Cai
authors.forename: Jiawei
authors.initials: J
authors.lastname: Liu
authors.forename: Huan
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Huang
authors.forename: Zhicheng
authors.initials: Z
authors.lastname: Lu
authors.forename: Mohamed F
authors.initials: MF
authors.lastname: Foda
authors.forename: Tingting
authors.initials: T
authors.lastname: Li
authors.forename: Heyou
authors.initials: H
authors.lastname: Han
keywords: nanotubes; oxygen; platinum; reduction; synthesis design