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<p>The methanol oxidation reaction is a critical half-reaction in direct methanol fuel cells (DMFCs), but its efficiency is limited by the low activity and poor stability of traditional electrocatalysts. This study reports the development of a high-performance PtCo/Mo<sub>2</sub>CT<sub><i>x</i></sub> catalyst for methanol oxidation in DMFCs. Synthesized by depositing PtCo alloy nanoparticles on Mo<sub>2</sub>CT<sub><i>x</i></sub> sheets prepared via cetyltrimethylammonium bromide-assisted etching of Mo<sub>2</sub>Ga<sub>2</sub>C, the PtCo/Mo<sub>2</sub>CT<sub><i>x</i></sub> catalyst achieved enhanced interlayer spacing and excellent dispersion of active sites. The optimized PtCo/Mo<sub>2</sub>CT<sub><i>x</i></sub> catalyst exhibited remarkable catalytic activity, reaching a mass activity of 2296&#xa0;mA·mg<sub>Pt</sub><sup>−1</sup>—6.5 times that of commercial Pt/C. Electrochemical studies confirmed the catalyst’s low charge transfer resistance, high electrochemical surface area, and strong CO anti-poisoning ability. Stability tests showed that the catalyst retained 62.26% activity after 1000 cycles. These improvements are attributed to the synergistic effects between Pt and Co, the conductive and layered structure of Mo<sub>2</sub>CT<sub><i>x</i></sub>, making PtCo/Mo<sub>2</sub>CT<sub><i>x</i></sub> a promising, durable anode material for DMFCs in sustainable energy applications.</p> Graphical abstract <p></p>

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MXene-supported PtCo bimetallic catalyst for high-performance methanol oxidation

  • 期刊论文

  • 发表日期：

    2025年6月20日

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  • Si-Jie Chang,
  • Xin Zhang,
  • Rui-Ge Wang,
  • Jun-Kai Wang,
  • Chao-Fan Wang,
  • Long-Fei Zhang,
  • Zhi-Peng Yu,
  • Qian-Ku Hu,
  • Ai-Guo Zhou

摘要

The methanol oxidation reaction is a critical half-reaction in direct methanol fuel cells (DMFCs), but its efficiency is limited by the low activity and poor stability of traditional electrocatalysts. This study reports the development of a high-performance PtCo/Mo2CTx catalyst for methanol oxidation in DMFCs. Synthesized by depositing PtCo alloy nanoparticles on Mo2CTx sheets prepared via cetyltrimethylammonium bromide-assisted etching of Mo2Ga2C, the PtCo/Mo2CTx catalyst achieved enhanced interlayer spacing and excellent dispersion of active sites. The optimized PtCo/Mo2CTx catalyst exhibited remarkable catalytic activity, reaching a mass activity of 2296 mA·mgPt−1—6.5 times that of commercial Pt/C. Electrochemical studies confirmed the catalyst’s low charge transfer resistance, high electrochemical surface area, and strong CO anti-poisoning ability. Stability tests showed that the catalyst retained 62.26% activity after 1000 cycles. These improvements are attributed to the synergistic effects between Pt and Co, the conductive and layered structure of Mo2CTx, making PtCo/Mo2CTx a promising, durable anode material for DMFCs in sustainable energy applications.

Graphical abstract