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- W2052953314 abstract "Mixed-potential-type gas sensors are promising solid-state devices for the in-situ detection of ppm concentrations of air pollutants in the atmosphere. In this study, we designed electrode structures of mixed-potential-type sensors using a BiCuVOx (Bi2V0.9Cu0.1O5.35) solid electrolyte to control the responses of electrodes to organic gases. Devices fitted with sensing and counter electrodes made of a composite of BiCuVOx and a perovskite-type oxide (La0.6Sr0.4Co0.8Fe0.2O3) were fabricated and tested for their ethanol-sensing properties. Sensor devices with a three-electrode configuration, in which a reference electrode was exposed to a standard air mixture, were fabricated to separately measure the potentials of the sensing and counter electrodes relative to the reference electrode. When a thin (30 μm) sensing electrode and a thick (68 μm) counter electrode were attached to a planar device, the sensing electrode exhibited high responses to ethanol at 350 and 400 °C. However, the overall signal was still small because the counter electrode also responded to ethanol. In another planar device in which the counter electrode was coated with a Pt/Al2O3 catalyst, the counter electrode exhibited almost no response to ethanol resulting in the generation of large sensor signals. This is because the catalyst layer efficiently decomposed ethanol and impeded its diffusion to the reaction interface between the counter electrode and the solid electrolyte. The device coated with the combustion catalyst also showed good response and recovery speeds and high stability under humid conditions indicating its feasibility as a practical, compact ethanol sensor." @default.
- W2052953314 created "2016-06-24" @default.
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- W2052953314 date "2010-08-13" @default.
- W2052953314 modified "2023-10-16" @default.
- W2052953314 title "Control of Electrode Reactions in a Mixed-Potential-Type Gas Sensor Based on a BiCuVOx Solid Electrolyte" @default.
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- W2052953314 doi "https://doi.org/10.1021/jp1047419" @default.
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