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›› 2013, Vol. 13 ›› Issue (4): 698-703.

• 材料工程专栏 • 上一篇    下一篇

微流控法合成石墨烯负载的PtNi燃料电池阴极催化剂及其性能

张东堂 程昌 汪夏燕 夏定国   

  1. 北京工业大学环境与能源工程学院 Analytical Department, Albany Molecular Research, Inc. 北京工业大学环境与能源工程学院 北京大学工学院
  • 收稿日期:2013-05-02 修回日期:2013-05-13 出版日期:2013-08-20 发布日期:2013-08-20
  • 通讯作者: 汪夏燕

Preparation and Characterization of PtNi-supported Graphene DMFC Cathode Electrocatalyst

ZHANG Dong-tang CHENG Chang WANG Xia-yan XIA Ding-guo   

  1. College of Environmental and Energy Engineering, Beijing University of Technology Analytical Department, Albany Molecular Research, Inc. College of Environmental and Energy Engineering, Beijing University of Technology College of Engineering, Peking University
  • Received:2013-05-02 Revised:2013-05-13 Online:2013-08-20 Published:2013-08-20
  • Contact: WANG Xia-yan

摘要: 利用微流控法,以氯铂酸和氯化镍为金属前驱体、硼氢化钠为还原剂,一步合成了石墨烯负载的铂镍燃料电池催化剂,对其进行了表征. 结果表明,在超声辅助条件下,聚乙烯吡咯烷酮为保护剂时,用微流控法可在数秒内得到分散性良好且形貌均一的PtNi/graphene电催化剂,PtNi纳米颗粒的平均粒径为2.1 nm,Pt含量为25.5%(w), 0.7 V (vs. NHE)电压下,电流密度达-107.6 mA/mg,是商业Pt/C(-37.9 mA/mg)的2.8倍,表现出良好的电化学催化活性.

关键词: 燃料电池, 催化剂, 微流控合成, PtNi/graphene, 氧还原

Abstract: Graphene supported PtNi nanoparticles as DMFC cathode were fabricated by one-step approach with H2PtCl6 and NiCl2 as precursors in a microfluidic system assisted with ultrasonic irradiation, and characterized. PtNi nanoparticles were uniformly dispersed on the graphene sheet while polyvinylpyrrolidone (PVP) was used as capping agent, and ultrasonic irradiation applied. The anchored PtNi nanoparticles had a narrow size distribution and an average size of 2.1 nm. The content of Pt was 25.5%(w) which was measured by ICP-AES. The mass activity at 0.7 V (vs., NHE) of the prepared PtNi/graphene electrocatalyst was -107.6 mA/mg which was 2.8 times higher than the commercial Pt/C (-37.9 mA/mg), which indicated good electrocatalytic activity of PtNi/graphene toward oxygen reduction reaction.

Key words: fuel cell, catalyst, microfluidic synthesis, PtNi/graphene, oxygen reduction

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