物理化学学报 >> 2011, Vol. 27 >> Issue (07): 1685-1688.doi: 10.3866/PKU.WHXB20110726

电化学和新能源 上一篇    下一篇

Pt纳米线阵列的氧还原催化性能

张敏1,2, 李经建2, 潘牧1, 徐东升2   

  1. 1. 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070;
    2. 北京大学化学与分子工程学院, 分子动态与稳态结构国家重点实验室, 北京分子科学国家实验室, 北京 100871
  • 收稿日期:2011-04-15 修回日期:2011-05-20 发布日期:2011-06-28
  • 通讯作者: 潘牧, 徐东升 E-mail:panmu@whut.edu.cn; dsxu@pku.edu.cn
  • 基金资助:

    武汉理工大学材料复合新技术国家重点实验室自主创新研究基金, 国家自然科学基金(21073007, 50821061)和国家重点基础研究发展计划项目(973) (2007CB936201)资助

Catalytic Performance of Pt Nanowire Arrays for Oxygen Reduction

ZHANG Min1,2, LI Jing-Jian2, PAN Mu1, XU Dong-Sheng2   

  1. 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China;
    2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2011-04-15 Revised:2011-05-20 Published:2011-06-28
  • Contact: PAN Mu, XU Dong-Sheng E-mail:panmu@whut.edu.cn; dsxu@pku.edu.cn
  • Supported by:

    The project was supported by the Self-determined and Innovative Research Funds of SKLWUT, China, National Natural Science Foundation of China (21073007, 50821061), and National Key Basic Research Program of China (973) (2007CB936201).

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摘要：

采用阳极氧化铝(AAO)模板法电化学沉积制备了Pt纳米线阵列(Pt NWs)氧还原催化剂, 通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和电化学测试对Pt纳米线阵列催化剂的形貌和电催化性能进行了表征. 循环伏安法(CV)研究表明Pt纳米线阵列催化剂的电化学活性面积大于其几何面积; 旋转圆盘电极(RDE)测试研究发现, 制备的Pt纳米线阵列催化剂的氧还原反应(ORR)曲线的半波电势相对Pt/C的有正移, 并且Pt纳米线阵列催化剂的极限扩散电流比Pt/C大.

关键词: AAO模板, 铂纳米线阵列, 氧还原反应, 质子交换膜燃料电池

Abstract:

Platinum nanowire arrays (Pt NWs) catalyst was fabricated by electrodepositing with anodic aluminum oxide (AAO) as a template. The morphology and oxygen reduction reaction (ORR) electrocatalytic properties of the as-prepared platinum nanowire array catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical measurements. The cyclic voltammetry (CV) showed that the specific electrochemical surface area (ECSA) of the Pt NWs was much higher than the geometric area. The half wave potential in the oxygen reduction reaction curves of the Pt NWs was more positive than that of Pt/C from the rotating disk electrode (RDE) measurements. Moreover, Pt NWs catalysts give higher limiting diffusion current by comparison with that of conventional Pt/C catalyst.

Key words: AAO template, Platinum nanowire array, Oxygen reduction reaction, Proton exchange membrane fuel cell