Hydrogen sensing ability of Cu particles coated with ferromagnetic Pd–Co layer
| Autor: | Satoshi Akamaru, Li Jin, Masanori Hara, Katsuhiko Nishimura, Masao Matsuyama, Takayuki Abe |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Exothermic reaction
Materials science Hydrogen Moisture Renewable Energy Sustainability and the Environment 05 social sciences Metallurgy Energy Engineering and Power Technology chemistry.chemical_element Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Hydrogen sensor Magnetic susceptibility Fuel Technology chemistry Chemical engineering Sputtering 0502 economics and business Particle 050207 economics 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 42:16305-16312 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.05.125 |
| Popis: | A new hydrogen sensor utilizing a ferromagnetic hydrogen absorbing alloy was developed. An optimum sensing element, Cu particles coated with Pd–Co hydrogen absorbing alloy was prepared by the barrel sputtering technique. The surface of prepared Cu particle was covered uniformly by Pd–Co thin layer constituted of aggregated nanoparticles. The sensitivity of the sensing element to H2 concentrations under flowing dry N2 and dry air gases was examined. The element has a reasonable sensitivity to the H2 concentration of the range from 3.8% to 0.2%, and the lower limit of detectable H2 concentration was estimated to be less than 0.1%. In dry air, the water formation on the Pd–Co surface affected its sensing ability, because the temperature of the sensing element increased by the exothermic reaction. The effect of moisture on the H2 sensing ability was also investigated. The moisture slightly degraded the output signal under flowing air. It could be ascribed to an additional consumption of hydrogen atoms by water molecules and oxygen atoms on the Pd–Co surface. This sensor takes advantage of magnetic susceptibility measurement, which requires no electrical wire between the sensing element and an electric circuit, leading to a safe evaluation system of H2 concentration in air. |
| Databáze: | OpenAIRE |
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