Novel Strategy for Preparation of Graphene-Pd, Pt Composite, and Its Enhanced Electrocatalytic Activity for Alcohol Oxidation

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• 作者：Lina Gao ; Wenbo Yue ; Shanshan Tao ; Louzhen Fan
• 刊名：Langmuir
• 出版年：2013
• 出版时间：January 22, 2013
• 年：2013
• 卷：29
• 期：3
• 页码：957-964
• 全文大小：582K
• 年卷期：v.29,no.3(January 22, 2013)
• ISSN：1520-5827

文摘

As advanced electrodes for direct alcohol fuel cells, graphene-Pd and graphene-Pt composites with a trace of SnO₂ have been successfully synthesized by a modified electroless plating technique. The surface of graphene oxide is first sensitized by Sn²⁺ ions, and subsequently, Pd or Pt nanoparticles are deposited on the surface of graphene oxide. Finally, graphene oxide was reduced to graphene by further adding NaBH₄. Compared to other carbon-(e.g., Vulcan XC-72R) supported Pd and Pt, the resultant graphene-Pd and Pt composites exhibit better electrocatalytic activity and long-term stability toward alcohol electrooxidation. Additionally, a trace amount of SnO₂ formed around active catalysts may also be beneficial to the enhancement of electrochemical activity.