High-performance solid-electrolyte carbon dioxide sensor with a binary carbonate electrode
High-performance solid-electrolyte carbon dioxide sensor with a binary carbonate electrode
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DOI：
10.1016/0925-4005(92)80211-f
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发表时间：
1992-10
影响因子：
8.4
通讯作者：
N. Miura;S. Yao;Y. Shimizu;N. Yamazoe
中科院分区：
文献类型：
--
作者：
N. Miura;S. Yao;Y. Shimizu;N. Yamazoe
基于Na+导电固体电解质（NASICON）的紧凑型固态co2传感器可以通过使用BaCO3Na2CO3二元碳酸盐电极大大改善响应时间和水蒸气阻力。对于二氧化碳浓度从4到40000ppm的广泛范围，在550°C下检测的电动势（e.m.f）遵循与CO2双电子反应对应的能斯特方程，90%的响应时间短至8秒或更短。与纯na2co3电极相比，水蒸气几乎不会影响传感器的特性。讨论了碳酸盐二元电极的结构和传感机理。
A compact solid-state CO2sensor based upon an Na+-conducting solid electrolyte (NASICON) can be improved drastically in response time and water vapour resistance by the use of a binary carbonate electrode of BaCO3Na2CO3. For a wide range of CO2concentration from 4 to 400 000 ppm, the electromotive force (e.m.f.) examined at 550 °C follows a Nernst equation correspondence to a two-electron reaction of CO2, with a 90% response time as short as 8 s or less. Water vapour hardly affects the sensor characteristics, in contrast to the case of a pure Na2CO3electrode. The structure and CO2-sensing mechanism of the binary carbonate electrode are also discussed.