Stabilization of sensing performance for mixed-potential-type zirconia-based hydrocarbon sensor
Stabilization of sensing performance for mixed-potential-type zirconia-based hydrocarbon sensor
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DOI：
10.1016/j.talanta.2011.04.024
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发表时间：
2011-07-15
期刊：
影响因子：
6.1
通讯作者：
Miura, Norio
中科院分区：
文献类型：
--
作者：
Fujio, Yuki;Plashnitsa, Vladimir V.;Miura, Norio
最近报道的附接有ZnCr（2）O（4）感测电极（SE）的混合电位型氧化钇稳定的氧化锆（YSZ）基碳氢化合物（HC）传感器的感测特性被发现在550 ℃下在潮湿条件（5体积%）下操作10天后发生变化水蒸气）。为了提高本传感器的稳定性，通过添加YSZ粉末对SE材料进行了几种改性。结果，使用层压的（ZnCr（2）O（4）/YSZ）-SE的传感器在550 ℃下对100 ppm C（3）H（6）给出了稳定的电动势（emf）响应约一个月的检测。基于扫描电子显微镜（SEM）观察和交流复阻抗测量，得出结论：（ZnCr（2）O（4）/YSZ）-SE叠层传感器的稳定行为是由ZnCr（2）O（4）颗粒和YSZ颗粒之间的界面稳定性提供的。该传感器的灵敏度与C（3）H（6）浓度的对数（20-800 ppm）或各种碳氢化合物（HC）的混合物（90-2600 ppmC）的对数呈线性关系。此外，电动势响应不因O（2）（2-20 vol. %）的变化而改变，水（0-10.8体积%）和CO（2）（0-20体积%）浓度，并且没有观察到其他气体（CO、NO、NO（2）、H（2）和CH（4））的干扰。(C)2011 Elsevier B. V.保留所有权利。
The recently reported sensing characteristics of the mixed-potential-type yttria-stabilized zirconia (YSZ)-based hydrocarbon (HC) sensor attached with ZnCr(2)O(4)-sensing electrode (SE) were found to be changed after the 10-day operation at 550 degrees C under the wet condition (5 vol.%water vapor). To improve the stability of the present sensor, the several modifications of the SE material by adding YSZ powder were examined. As a result, the sensor using the laminated (ZnCr(2)O(4)/YSZ)-SE gave the stable electromotive force (emf) response against 100 ppm C(3)H(6) at 550 degrees C for about one month examined. Based on the scanning electron microscopy (SEM) observation and the AC complex-impedance measurements, it was concluded that the stable behavior of the sensor using the laminated (ZnCr(2)O(4)/YSZ)-SE was provided by the stabilization of the interface between ZnCr(2)O(4) grains and YSZ particles. The fabricated sensor exhibited the linear dependence of sensitivity on the logarithm of either C(3)H(6) concentration (in the range of 20-800 ppm) or mixtures of various hydrocarbons (HCs) (in the range of 90-2600 ppmC). In addition, the emf response was not altered by the change of O(2) (2-20 vol.%), H(2)O (0-10.8 vol.%) and CO(2) (0-20 vol.%) concentrations, and no interference of other gases (CO, NO, NO(2), H(2), and CH(4)) was observed. (C) 2011 Elsevier B.V. All rights reserved.