【摘要】 使用锂钡掺杂氧化碳酸盐作为敏感电极材料制备YSZCO₂电化学传感器,研究了高温水蒸汽对传感器性能的影响。结果表明,经300℃高温水蒸汽处理（24～120 h）后,传感器对CO₂浓度的变化（271～576802μL/L）仍然表现出准确的响应特性,电子转移数接近理论值2;未经高温水蒸汽处理和经高温水蒸汽处理120 h的传感器,均表现出较低的氧含量依赖特性,在不同的氧含量条件下传感器对CO₂浓度突变的响应电动势相同。这种传感器不但能在含有一定比例水蒸汽的环境中长时间工作,而且在经过一定程度的高温水蒸汽累积作用后其性能没有明显的劣化。更多还原

【Abstract】 Carbon dioxide electrochemical sensor was prepared with Li and Ba co-doped oxycarbonate as auxiliary sensing electrode and YSZ as electrolyte, then the influence of high temperature water vapor on the performance of the sensor was investigated. The results show that the potentiometric sensor respond correctly and rapidly to the change of CO₂ concentration（271～576802 μL/L） after pretreatment in water vapor（300℃） for 24～120 h. The number of transfer electrons of the electrode reactions were approximately 2. Low oxygen dependency was found for the sensors, whether they were pretreated or not in water vapor for 120 h, all responded rapidly and accordingly for different oxygen content. The sensor worked not only in water vapor for relatively long term, but also after the constantly water vapor treatment to some extent.更多还原