碳酸锂-碳酸钡-锂钡掺杂氧化碳酸盐作为敏感电极的CO2电化学传感器
CO2 electrochemical sensor with Li2CO3-BaCO3-Li and Ba co-doped oxycarbonate as its auxiliary sensing electrode
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摘要: 利用碳酸锂-碳酸钡-锂钡掺杂氧化碳酸盐所形成的复合物作为敏感电极材料,YSZ作为固体电解质,构建二氧化碳电化学传感器,并对传感器性能进行了研究。结果表明,基于碳酸锂-碳酸钡-锂钡掺杂氧化碳酸盐的YSZ二氧化碳传感器具有快速和准确的电动势响应,传感器电子转移数近似为2;随着测试温度的升高,所制传感器对待测气体中二氧化碳浓度变化的电动势响应更快,稳定状态更好;随着待测体系中水蒸汽的引入,传感器在二氧化碳浓度较高时稳定响应特性受到一定程度的影响。Abstract: The CO2 sensor having Li2CO3-BaCO3-Li and Ba co-doped oxycarbonate as its auxiliary sensing electrode and YSZ as its electrolyte was designed and studied.The results indicated that the potentiometric sensor respond correctly and rapidly to the change of CO2 concentration.Transfer electrons of the electrode reactions were approximately 2.The sensor responded more rapidly and exhibited more stable as the measuring temperature increased.With the introduction of water vapor,the stable response of sensor was influenced,especially under the condition of high CO2 concentration.
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