Dendritic platinum–copper bimetallic nanoassemblies with tunable composition and structure: Arginine-driven self-assembly and enhanced electrocatalytic activity

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• 作者：Gengtao Fu ; Huimin Liu ; Nika You ; Jiayan Wu ; Dongmei Sun ; Lin Xu…
• 关键词：platinum–copper ; nanoassemblies ; arginine molecules ; electrocatalysis ; methanol oxidation
• 刊名：Nano Research
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：9
• 期：3
• 页码：755-765
• 全文大小：2,514 KB
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• 作者单位：Gengtao Fu (2) (3)
  Huimin Liu (1)
  Nika You (2)
  Jiayan Wu (2)
  Dongmei Sun (2)
  Lin Xu (2)
  Yawen Tang (2)
  Yu Chen (1)
  
  2. Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
  3. Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
  1. Key Laboratory of Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000

文摘

Novel self-assembled architectures have received a growing amount of attention and have significant potential for application in catalysis/electrocatalysis. Herein, we take advantage of the unique coordination and self-assembly properties of arginine for the preparation of dendritic PtCu bimetallic nanoassemblies with tunable chemical composition and structure. Strong interactions between the arginine molecules are key in driving the self-assembly of primary nanocrystals. In addition, the strong coordination interactions between arginine and metal ions is responsible for the formation of Pt–Cu alloys. We also investigated the electrocatalytic activity of various dendritic PtCu bimetallic nanoassemblies towards the methanol oxidation reaction. Pt₃Cu₁ nanoassemblies exhibited excellent electrocatalytic activity and stability in comparison with other PtCu bimetallic nanoassemblies (Pt₁Cu₃, Pt₁Cu₁) and commercial Pt black, due to their unique dendritic structures and the synergistic effect between the Pt and Cu atoms.