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Vapor-feed low temperature direct methanol fuel cell with Pt and PtRu electrodes: Chemistry insight

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  • Johánek, Viktor
  • Ostroverkh, Anna
  • Fiala, Roman

Abstract

The performance of a vapor-fed low-temperature direct methanol fuel cell (DMFC) with Nafion proton exchange membrane has been analyzed and compared to identical fuel cell assembly supplied with liquid methanol diluted in water. The cell was subjected to a wide range of methanol concentrations and power loads. The potentiostatic measurements were correlated with the composition of gases released at the anode determined by on-line mass spectroscopy. Both Pt and PtRu catalysts supported on carbon were used at the DMFC anode while cathode comprised pristine Pt on C in all cases. It is demonstrated experimentally that although the vapor-fed system is generally more complex and require an additional source of heat or utilization of the waste reaction heat, it shows its potential to be more efficient and tunable than conventional liquid-fed FCs as well as more resistant to poisoning, even in the absence of ruthenium in the anode catalyst. Energy efficiency of 30% and power density exceeding 70 mW cm−2 were achieved with Pt/C electrodes without any noticeable long-term degradation.

Suggested Citation

  • Johánek, Viktor & Ostroverkh, Anna & Fiala, Roman, 2019. "Vapor-feed low temperature direct methanol fuel cell with Pt and PtRu electrodes: Chemistry insight," Renewable Energy, Elsevier, vol. 138(C), pages 409-415.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:409-415
    DOI: 10.1016/j.renene.2019.01.109
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    References listed on IDEAS

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    1. Mallick, Ranjan K. & Thombre, Shashikant B. & Shrivastava, Naveen K., 2016. "Vapor feed direct methanol fuel cells (DMFCs): A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 51-74.
    2. Sharaf, Omar Z. & Orhan, Mehmet F., 2014. "An overview of fuel cell technology: Fundamentals and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 32(C), pages 810-853.
    3. Yuan, Wei & Zhang, Zhaochun & Hu, Jinyi & Zhou, Bo & Tang, Yong, 2014. "Passive vapor-feed direct methanol fuel cell using sintered porous metals to realize high-concentration operation," Applied Energy, Elsevier, vol. 136(C), pages 143-149.
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    1. Fang, Yuan & Zhang, Tingting & Wang, Yonghui & Chen, Yuanzhen & Liu, Yan & Wu, Wenling & Zhu, Jianfeng, 2020. "The highly efficient cathode of framework structural Fe2O3/Mn2O3 in passive direct methanol fuel cells," Applied Energy, Elsevier, vol. 259(C).

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