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<p>Hydrogen gas sensors based on metal oxide semiconductors are gaining attention due to their low cost, high sensitivity, and miniaturization potential. In this study, we investigate the structural, optical, and electrical properties of nickel oxide (NiO) thin films doped with lithium (Li) and decorated with palladium (Pd) nanoparticles for hydrogen detection. Thin films were synthesized by sol-gel spin coating technique and characterized using X-ray diffraction (XRD), UV-Vis spectroscopy, and electrical measurements. Results show that Li doping and Pd decoration significantly enhance the sensor’s sensitivity, reduce response time, and lower the operating temperature. The synergistic effect of Li and Pd improves charge transport and catalytic activity, making NiO: Li: Pd a promising candidate for efficient hydrogen sensing under ambient conditions.</p>

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Optimized hydrogen sensing using Li-doped NiO thin films functionalized with Pd nanoparticles prepared by sol-gel technique

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • M. Jlassi,
  • I. Sta,
  • M. Hajji,
  • M. Kompitsas

摘要

Hydrogen gas sensors based on metal oxide semiconductors are gaining attention due to their low cost, high sensitivity, and miniaturization potential. In this study, we investigate the structural, optical, and electrical properties of nickel oxide (NiO) thin films doped with lithium (Li) and decorated with palladium (Pd) nanoparticles for hydrogen detection. Thin films were synthesized by sol-gel spin coating technique and characterized using X-ray diffraction (XRD), UV-Vis spectroscopy, and electrical measurements. Results show that Li doping and Pd decoration significantly enhance the sensor’s sensitivity, reduce response time, and lower the operating temperature. The synergistic effect of Li and Pd improves charge transport and catalytic activity, making NiO: Li: Pd a promising candidate for efficient hydrogen sensing under ambient conditions.