1. 上海交通大学动力机械与工程教育部重点实验室
2. 上海交通大学智慧能源创新学院
Published：2024
移动端阅览
[J]. 2024, (4): 28-32.
采用自蔓延燃烧（SHS）法合成了纳米敏感材料一氧化铟（In
2
O
3
）
以氧化钇稳定的氧化锆（YSZ）为固体电解质，铂（Pt）为参比电极，制备了混合电位型氨气（NH
3
）传感器。采用X射线衍射（XRD）、扫描电镜（SEM）和透射电子显微镜（TEM）对敏感电极形貌进行表征。研究发现，随着电极厚度的增加，更多的NH
3
被吸附到表面参与电化学过程，传感性能增强；若电极层过厚，大部分NH
3
在穿过电极层到达三相界面（TPB）区域之前，被气固多相催化反应消耗，传感性能降低；SEM表征结果显示，最优的电极厚度为104.20μm。同时研究了粒径对性能的影响，在煅烧温度为900℃时，传感器表现出最高的灵敏度（-64.20 mV/decade）
TEM表征结果显示，此时晶粒的平均粒径为75.92 nm。通过极化曲线测试验证了传感器响应机理符合混合电位理论。
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