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<p>In this study, a platinum (Pt) nanoparticle-loaded multiwalled carbon nanotube material was fabricated. Polyethylene glycol was grafted onto the nanotube surface via noncovalent bonding to achieve high dispersibility without damaging the nanotube morphology, followed by the deposition of Pt nanoparticles via a polyol reduction method. Successful polymer grafting and Pt loading were confirmed by Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction. The resulting material was developed as an electrode for a hydrogen electromotive force (EMF) sensor to detect hydrogen gas below the H<sub>2</sub> explosion limit. The sensor electrode device responded rapidly to hydrogen, with a potential difference of approximately 100 mV and reproducible cycling stability. In addition, the electrochemically active surface area was qualitatively evaluated using cyclic voltammetry, which demonstrated the potential of the material as an electrocatalyst.</p>

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Platinum nanoparticle-supported polymer-grafted carbon nanotubes via noncovalent interactions and their application to hydrogen sensors

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Mingze Zhu,
  • Masaki Konno,
  • Shuji Harada,
  • Norio Tsubokawa,
  • Takeshi Yamauchi

摘要

In this study, a platinum (Pt) nanoparticle-loaded multiwalled carbon nanotube material was fabricated. Polyethylene glycol was grafted onto the nanotube surface via noncovalent bonding to achieve high dispersibility without damaging the nanotube morphology, followed by the deposition of Pt nanoparticles via a polyol reduction method. Successful polymer grafting and Pt loading were confirmed by Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction. The resulting material was developed as an electrode for a hydrogen electromotive force (EMF) sensor to detect hydrogen gas below the H2 explosion limit. The sensor electrode device responded rapidly to hydrogen, with a potential difference of approximately 100 mV and reproducible cycling stability. In addition, the electrochemically active surface area was qualitatively evaluated using cyclic voltammetry, which demonstrated the potential of the material as an electrocatalyst.