高温水蒸汽对<strong>CO<sub>2</sub></strong>电化学传感器性能的影响

doi:10.11901/1005.3093.2018.711

材料研究学报

2019, Vol. 33

Issue (9): 713-720 DOI: 10.11901/1005.3093.2018.711

研究论文

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高温水蒸汽对CO₂电化学传感器性能的影响

王光伟^1,²(

),陈鸿珍²,李友凤¹,谢波¹,江忠远¹

1. 遵义师范学院化学化工学院遵义 563006
2. 中国科学院水库水环境重点实验室中国科学院重庆绿色智能技术研究院重庆 400714

Influence of High Temperature Water Vapor on Characteristics of CO₂ Electrochemical Sensor

WANG Guangwei^1,²(

),CHEN Hongzhen²,LI Youfeng¹,XIE Bo¹,JIANG Zhongyuan¹

1. Department of Chemistry and Chemical Engineering, Zunyi Normal University, Zunyi 563006, China
2. Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology (CIGIT), Chinese Academy of Sciences, Chongqing 400714, China

引用本文:

王光伟,陈鸿珍,李友凤,谢波,江忠远. 高温水蒸汽对CO₂电化学传感器性能的影响[J]. 材料研究学报, 2019, 33(9): 713-720.
Guangwei WANG, Hongzhen CHEN, Youfeng LI, Bo XIE, Zhongyuan JIANG. Influence of High Temperature Water Vapor on Characteristics of CO₂ Electrochemical Sensor[J]. Chinese Journal of Materials Research, 2019, 33(9): 713-720.

全文: PDF(4622 KB) HTML

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(271~576802 μL/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。

关键词 ：无机非金属材料, 掺杂, 氧化碳酸盐, 水蒸汽, YSZ, CO₂传感器

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.

Key words： inorganic non-metallic materials dope oxycarbonate water vapor YSZ CO₂ sensor

收稿日期: 2018-12-16

ZTFLH:

TQ174.7

基金资助:国家自然科学基金(41763008);贵州省基础研究计划（重点）(2019-1461);贵州省科技支撑计划(2018-2774);贵州省普通高等学校科技拔尖人才支持计划(2017-086);遵义师范学院博士启动基金(BS2017-02);重庆市前沿与应用基础研究项目(cstc2015jcyjA20008)

作者简介: 王光伟，男，1979年生，博士，副研究员

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https://www.cjmr.org/CN/10.11901/1005.3093.2018.711 或 https://www.cjmr.org/CN/Y2019/V33/I9/713

图1 CO2传感器的结构示意图

表1 传感器的高温水蒸汽处理

图2 敏感电极的X射线衍射谱图

图3 敏感电极表面的扫描电镜照片

图4 CO2浓度连续变化时传感器的响应

图5 CO2浓度连续变化时传感器的响应

表2 CO2浓度连续变化时传感器的电子转移数n和电动势变化率△E

表3 CO2浓度连续变化(271→576802→271 μL/L)时传感器的电子转移数n及电动势变化率△E

图6 传感器的稳定性

图7 传感器在水蒸汽存在条件下的响应

图8 传感器在水蒸汽存在条件下的长时间稳定性

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