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<p>The composite materials of Pt-based catalysts and metal oxides have potential advantages in direct methanol fuel cells. However, synthesizing controllable Pt-based catalysts with high electrochemical properties is still challenging. In this paper, commercial Pt/C is improved by replacing commercial carbon black with carbon nanotubes and adding Ta<sub>2</sub>O<sub>5</sub> cocatalyst. The particle size, structure, surface morphology, activity, and stability of the methanol oxidation reaction (MOR) of Pt/Ta<sub>2</sub>O<sub>5</sub>/MWCNTs composites were studied. The prepared Pt/Ta<sub>2</sub>O<sub>5</sub>/MWCNTs catalysts have higher catalytic activity and durability than commercial Pt/C in methanol electrooxidation reactions. In addition, when the loading of co-catalyst and Pt nanoparticles is adjusted, the catalyst with the loading of 20% Pt/MWCNTs/Ta<sub>2</sub>O<sub>5</sub>-15% has better electrochemical activity. This study shows that the Pt/ Ta<sub>2</sub>O<sub>5</sub>/MWCNTs catalyst should be a promising DMFC catalyst. </p> Graphical Abstract <p></p>

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Platinum Nanoparticles Loaded on Ta2O5/MWCNTs to Improve Methanol Electrooxidation Activity

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Bohua Wu,
  • Yifan Liu,
  • Fengxiao Du,
  • Xicheng Lu,
  • Xiaoqin Wang,
  • Shanxin Xiong

摘要

The composite materials of Pt-based catalysts and metal oxides have potential advantages in direct methanol fuel cells. However, synthesizing controllable Pt-based catalysts with high electrochemical properties is still challenging. In this paper, commercial Pt/C is improved by replacing commercial carbon black with carbon nanotubes and adding Ta2O5 cocatalyst. The particle size, structure, surface morphology, activity, and stability of the methanol oxidation reaction (MOR) of Pt/Ta2O5/MWCNTs composites were studied. The prepared Pt/Ta2O5/MWCNTs catalysts have higher catalytic activity and durability than commercial Pt/C in methanol electrooxidation reactions. In addition, when the loading of co-catalyst and Pt nanoparticles is adjusted, the catalyst with the loading of 20% Pt/MWCNTs/Ta2O5-15% has better electrochemical activity. This study shows that the Pt/ Ta2O5/MWCNTs catalyst should be a promising DMFC catalyst.

Graphical Abstract