Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (7): 1089-1095.DOI: 10.1016/S1872-2067(15)61077-4

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Controllable fabrication of ordered Pt nanorod array as catalytic electrode for passive direct methanol fuel cells

Yanlin Wanga,b, Qingqing Chenga,b, Ting Yuanb, Yi Zhoub, Haifeng Zhangb, Zhiqing Zoub, Jianhui Fanga, Hui Yangb   

  1. a. Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China;
    b. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • Received:2016-01-28 Revised:2016-03-03 Online:2016-06-17 Published:2016-06-17
  • Contact: Jianhui Fang, Hui Yang
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2012CB932800) and the National Natural Science Foundation of China (21533005, 21276158, 21303243, 51506213).

Abstract:

The nanostructure of the catalytic electrode has a great effect on the performance of direct methanol fuel cells (DMFCs), including catalyst utilization, precious metal loading, water balance, and oxygen mass transfer. In this work, ordered arrays of platinum nanorods with different diameters were directly grown onto microporous layers by electrodeposition via a sacrificial template, and were used as the catalytic cathode for passive DMFCs. The use of these ordered electrodes led to a dramatic decrease in cathode polarization behavior. The maximum power density of passive DMFCs fabricated with catalytic electrodes of 200 and 100 nm Pt nanorod arrays were 17.3 and 12.0 mW/cm2, respectively. The obtained improvement in performance was ascribed to the fact that the ordered nanostructured electrode not only increased the electrochemically active surface area and the catalyst utilization, but also enhanced oxygen mass transfer and water balance in the system.

Key words: Catalytic electrode, Ordered nanorod, Catalyst utilization, Direct methanol fuel cell