Room temperature hydrogen sensors based on metal decorated WO3 nanowires

Jarmo Kukkola, Melinda Mohl, Anne Riikka Leino, Jani Mäklin, Niina Halonen, Andrey Shchukarev, Zoltan Konya, Heli Jantunen, Krisztian Kordas

Research output: Contribution to journalArticle

56 Citations (Scopus)


The emerging hydrogen economy has created a demand for the development of improved hydrogen sensors operating at room temperature. In this work, we present hydrogen detectors based on metal decorated WO3 nanowires that were able to detect 1000 ppm of H2, even at room temperature (30 C), with relatively short recovery time and high sensitivity. The nanowires were synthesized by a hydrothermal process and decorated with PdO and PtO x nanoparticles by decomposition of Pd(acac)2 and Pt(acac)2 precursors. The gas responses were tested for H 2, NO, H2S and CO analyte gases in an air buffer at 150, 200 and 250 C (H2 also at 30, 70 and 130 C).

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalSensors and Actuators, B: Chemical
Publication statusPublished - Jul 3 2013


  • Gas sensor
  • Hydrogen sensor
  • Metal oxide
  • Nanowire
  • Tungsten oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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  • Cite this

    Kukkola, J., Mohl, M., Leino, A. R., Mäklin, J., Halonen, N., Shchukarev, A., Konya, Z., Jantunen, H., & Kordas, K. (2013). Room temperature hydrogen sensors based on metal decorated WO3 nanowires. Sensors and Actuators, B: Chemical, 186, 90-95.