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
纸质出版:2024
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吴春平, 杨琳, 张毅然, 等. 电极厚度和粒径对In2O3氨气传感器性能的影响[J]. 传感器与微系统, 2024,(4):28-32.
吴春平, 杨琳, 张毅然, 等. 电极厚度和粒径对In2O3氨气传感器性能的影响[J]. 传感器与微系统, 2024,(4):28-32. DOI: 10.13873/J.1000-9787(2024)04-0028-05.
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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