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<p>This study investigates the enhancement of acetone sensing in Ru-modified WO<sub>3</sub> nanofibers (NFs), focusing on strong metal–support interactions (SMSI) as the key mechanism. RuO<sub>2</sub>–WO<sub>3</sub> NFs were synthesized via a one-step electrospinning method, showing initial improvements in acetone sensing. Upon reduction in a H<sub>2</sub>/Ar mixture, Ru–WO<sub>3</sub> NFs were obtained, exhibiting significantly enhanced sensing performance due to the SMSI between Ru and WO<sub>3</sub>. The synthesized materials were systematically characterized using various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–Vis) absorption spectroscopy, and ultraviolet photoelectron spectroscopy (UPS). Sensing tests revealed that Ru–WO<sub>3</sub> NFs showed a response to 50&#xa0;ppm acetone with a signal intensity approximately 4.0 times greater than that of WO<sub>3</sub> NFs at 300&#xa0;°C. Additionally, the Ru–WO<sub>3</sub> NFs demonstrated rapid response and recovery times (6/8&#xa0;s), good selectivity, and long-term stability. The significant improvement in acetone sensing performance was attributed to the enhanced electron transfer facilitated by the SMSI, as well as the catalytic effects of the Ru species. These findings highlight the potential of Ru-modified WO<sub>3</sub> NFs for highly efficient and selective acetone detection.</p>

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Ru-modified WO3 nanofibers for enhanced acetone sensing via strong metal–support interactions

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Jie Sun,
  • Yulin Tao,
  • Pingyang Zheng,
  • Jinniu Zhang,
  • Jianzhi Gao,
  • Hongbing Lu,
  • Yaojie Sun

摘要

This study investigates the enhancement of acetone sensing in Ru-modified WO3 nanofibers (NFs), focusing on strong metal–support interactions (SMSI) as the key mechanism. RuO2–WO3 NFs were synthesized via a one-step electrospinning method, showing initial improvements in acetone sensing. Upon reduction in a H2/Ar mixture, Ru–WO3 NFs were obtained, exhibiting significantly enhanced sensing performance due to the SMSI between Ru and WO3. The synthesized materials were systematically characterized using various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–Vis) absorption spectroscopy, and ultraviolet photoelectron spectroscopy (UPS). Sensing tests revealed that Ru–WO3 NFs showed a response to 50 ppm acetone with a signal intensity approximately 4.0 times greater than that of WO3 NFs at 300 °C. Additionally, the Ru–WO3 NFs demonstrated rapid response and recovery times (6/8 s), good selectivity, and long-term stability. The significant improvement in acetone sensing performance was attributed to the enhanced electron transfer facilitated by the SMSI, as well as the catalytic effects of the Ru species. These findings highlight the potential of Ru-modified WO3 NFs for highly efficient and selective acetone detection.