摘要
选择性催化还原(SCR)技术是当前最有效的汽车尾气处理手段之一。工作过程中需要高性能的高温气体传感器对NH_(3)的浓度进行实时监测。为了提高NH_(3)传感器的性能,研究了BaZr_(0.2)Fe_(0.6)Y_(0.2)O_(3)-δ在高温电化学NH_(3)传感器中的敏感特性。相比于传统的Pt电极,BaZr_(0.2)Fe_(0.6)Y_(0.2)O_(3)-δ具有电子、质子和氧离子三重导电的特性,该特性使得NH_(3)传感器的三相反应界面从电极与电解质的界面处扩展到了整个敏感电极的表面,增加了电化学反应的区域和反应活性位点的数量,有利于提高传感器的灵敏度。此外,该传感器还表现较好的选择性、重复性以及长期稳定性,具有一定的应用前景。
Selective catalytic reduction(SCR)technology is one of the most effective methods for automotive exhaust treatment.During its operation,highperformance hightemperature gas sensors are demanded for realtime monitoring of NH_(3)concentration.To enhance performance of NH_(3)sensors,sensing properties of BaZr_(0.2)Fe_(0.6)Y_(0.2)O 3-δin hightemperature electrochemical NH_(3)sensors are studied.Compared to traditional Pt electrodes,BaZr_(0.2)Fe_(0.6)Y_(0.2)O_(3)-δexhibits the triple conductivity of electrons,protons,and oxygen ions,the property makes the threephase reaction interface of NH_(3)sensors extend from the electrodeelectrolyte interface to the entire surface of the sensing electrode,increases the electrochemical reaction area and the number of reactive sites,which is beneficial to enhancing the sensitivity of sensor.In addition,the sensor exhibits good selectivity,repeatability,and longterm stability,and has promising applications prospects.
作者
张换换
程振乾
简家文
邹杰
ZHANG Huanhuan;CHENG Zhenqian;JIAN Jiawen;ZOU Jie(College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;The 49th Research Institute of China Electronics Technology Group Corporation,Harbin 150028,China)
出处
《传感器与微系统》
北大核心
2025年第5期6-11,共6页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(62471267)
浙江省基础公益研究计划项目(LGG22F010017)
宁波市重点研发计划项目(2022Z093,2022Z092)
重庆市自然科学基金资助项目(CSTB2023NSCQ-LZX0045)。
