Room temperature hydrogen sensors based on metal decorated WO₃ nanowires

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• 作者：Jarmo Kukkola ; Melinda Mohl ; Anne-Riikka Leino ; Jani M?klin ; Niina Halonen ; Andrey Shchukarev ; Zoltan Konya ; Heli Jantunen ; Krisztian Kordas
• 关键词：Metal oxide ; Tungsten oxide ; Gas sensor ; Hydrogen sensor ; Nanowire
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：186
• 期：Complete
• 页码：90-95
• 全文大小：2379 K

文摘

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 ¡ãC), 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 H₂, NO, H₂S and CO analyte gases in an air buffer at 150, 200 and 250 ¡ãC (H₂ also at 30, 70 and 130 ¡ãC).