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Dr. Mohamed Frahat Foda Ali :: Publications: |
Title: | Facile Synthesis of Quasi-One-Dimensional Au/PtAu Heterojunction Nanotubes and Their Application as Catalysts in an Oxygen-Reduction Reaction |
Authors: | Kai Cai, Jiawei Liu, Huan Zhang, Zhao Huang, Zhicheng Lu, Mohamed F Foda, Tingting Li, Heyou Han |
Year: | 2015 |
Keywords: | nanotubes;oxygen;platinum;reduction;synthesis design |
Journal: | Chemistry - A European Journal |
Volume: | 21 |
Issue: | Not Available |
Pages: | 1-7 |
Publisher: | Wiley-VCH Verlag GmbH& 1 Co. KGaA, Weinheim |
Local/International: | International |
Paper Link: | |
Full paper | Mohamed Frahat Foda Ali_Cai_et_al-2015-Chemistry_-_A_European_Journal1.pdf |
Supplementary materials | Not Available |
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. |