| Pt/YSZ泵氧电极响应特性研究 |
| |
| 引用本文： | 雷超,李向东,胡永刚,彭周,肖建中.Pt/YSZ泵氧电极响应特性研究[J].电子元件与材料,2013,32(1):19-22. |
| |
| 作者姓名： | 雷超 李向东 胡永刚 彭周 肖建中 |
| |
| 作者单位： | 华中科技大学 材料成型与模具技术国家重点实验室,湖北武汉,430074 |
| |
| 基金项目： | 国家重点实验室重大科研项目资助(No.2011ZX05048);企业资助项目 |
| |
| 摘 要： | 以钇稳定氧化锆(简称YSZ)为固体电解质,Pt/YSZ为电极材料,制备了NOx传感器。采用计时电流法(chronoamperometry)和电化学阻抗法(EIS)研究了Pt/YSZ泵氧电极对O2和NO的响应特性。结果表明,氧气浓度基本不影响电极活化能,在相同测试温度下,随着氧气浓度的增加,泵电流呈直线增加,界面电阻降低;氧气浓度一定时,泵电流与测试温度呈指数关系。特定测试温度下,随着NO浓度增加,泵电流呈指数增长趋势,而界面电阻逐步降低。
|
| 关 键 词： | NOx传感器 Pt/YSZ 计时电流法 电化学阻抗法 响应特性 |
Research on response characteristic of pump oxygen electrode(Pt/YSZ) |
| |
| LEI Chao,LI Xiangdong,HU Yonggang,PENG Zhou,XIAO Jianzhong.Research on response characteristic of pump oxygen electrode(Pt/YSZ)[J].Electronic Components & Materials,2013,32(1):19-22. |
| |
| Authors: | LEI Chao LI Xiangdong HU Yonggang PENG Zhou XIAO Jianzhong |
| |
| Affiliation: | (State Key Laboratory of Material Processing and Die and Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China) |
| |
| Abstract: | NOx sensor was prepared by using yttria-stabilized zirconia(YSZ) as solid electrolyte and Pt /YSZ as electrode material.The response characteristics of pump oxygen electrode(Pt/YSZ) to O2 and NO were analyzed by using chronoamperometry and electrochemical impedance spectroscopy(EIS).The results show that the concentration of oxygen dose not affect the electrode activation energy,and at the same test temperature,the pump current increases in a linear way with the increasing of oxygen concentration,while the interface resistance decreases;when the concentration of oxygen is fixed,pump current is an exponential function of working temperature.When the working temperature is fixed,pump current increases with the concentration of NO by index,but the interface resistance decreases gradually. |
| |
| Keywords: | NOx sensor Pt/YSZ chronoamperometry EIS response characteristic |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
