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- W3000329315 abstract "Abstract The SmMn2O5 was prepared by sol-gel method and characterized by X-ray diffraction, BET and scanning electron microscope. A potentiometric methane sensor was fabricated at the sintering temperature of 900 °C by using SmMn2O5 as sensing electrode and YSZ as solid electrolyte. The response signal for different concentrations of methane was tested at 350–500 °C. With the increase of operating temperature from 350 °C to 500 °C, the methane sensitivity decreases gradually from −47.97 mV/decade to −13.96 mV/decade, meanwhile the response and recovery rates accelerate. At the optimal operating temperature of 400 °C, the response and recovery times are significantly shortened to 27 s and 33 s for 400 ppm CH4, respectively, while the sensitivity is only reduced slightly to −44.50 mV/decade. The linear relationship between the response values and the logarithm of CH4 concentration confirms the mixed potential mechanism of the prepared sensor. The sensor attached with SmMn2O5-SE has a good CH4 selectivity with small cross sensitivity to C3H8 and CO2, and it also shows good reproducibility and long-term stability, which indicate that there is a potential for SmMn2O5 to the methane leakage warning." @default.
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- W3000329315 date "2020-04-01" @default.
- W3000329315 modified "2023-10-14" @default.
- W3000329315 title "A potentiometric sensor based on SmMn2O5 sensing electrode for methane detection" @default.
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- W3000329315 doi "https://doi.org/10.1016/j.matchemphys.2020.122679" @default.
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