Design and development of compact, high-performance NOx sensors for preservation of environment

设计和开发用于保护环境的紧凑型高性能氮氧化物传感器

• 批准号: 09450320
• 负责人: MIURA Norio
• 金额: $ 9.09万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450320/
• 关键词: NOx sensor; Preservation of environment; Solid electrolyte; Stabilized zirconia; NASICON; Oxide Semiconductor; Amperometric detection; Mixed potential; NOxセンサ; 団体電解質; 酸化ビスマス; スピネル型酸化物; 電線検出方式; 安定性ジルコニア; スピネル酸化物; 限界電流

The purpose of the present study is the development of new type high-performance NOx sensors with the aim of preservation of environment. Four types of solid-state NOx sensors based on ionic conductors or oxide semiconductors were proposed here and their sensing properties were examined. (1) The stabilized zirconia-based electrochemical devices using the oxide sensing electrodes were tested for NOx sensing properties at high temperature. Among the many metal oxides examined, CdCr2O4 or WO3 was found to give the best sensing properties to NO and NO2 at 500-700℃. The EMF response of the device was linear to the logarithm of NOx concentration. (2) The stabilized zirconia-based devices using oxide electrode for selective amperometric detection of NO at high temperature. The CdCr2O4-attached tubular device showed quick and selective response to NO over NO2 at 500 and 550℃, if the potential of sensing electrode was polarized properly at + 100 mV vs. the reference Pt electrode. The 90% respon … More se time of the divide to 100 ppm NO was as short as ca. 20 s at 500℃. The current response was well correlated to the NO concentration in the range of 0 - 200 ppm. (3) A new solid-state amperometric sensor for NO2 was fabricated by combining an NaィイD1+ィエD1 conductor (NASICON) based device with an NaNO2 layer deposited on the counter electrode. With the sensing electrode polarized at - 150 mV relative to the reference Au electrode at 150℃, the electric current flowing through the device under exposure to NO2 was linear to the NO2 concentration in the range from 10 ppb to 1 ppm. (4) A search for semiconducting oxides was carried out to design a sensor selective to NO over NO2. Bi2O3 was very selective to NO through not very sensitive among the various oxides examined, and NiO was proved to be the most effective promoter to Bi2O3 for enhancing NO sensitivity. The sensor element using 5wt%NiO-Bi2O3 showed fairly good sensing properties to NO in the range of 0 - 400 ppm in sensitivity, selectivity over NO2, and response rate, at 300℃. Less

本研究的目的是开发新型高性能NOx传感器，以保护环境。本文提出了四种基于离子导体和氧化物半导体的固态NOx传感器，并考察了它们的传感性能。(1)测试了使用氧化物传感电极的稳定的氧化锆基电化学装置在高温下的NOx传感性能。在所研究的多种金属氧化物中，发现CdCr_2O_4或WO_3在500-700℃对NO和NO_2的敏感性能最好。该装置的电动势响应与NOx浓度的对数呈线性关系。(2)稳定氧化锆基氧化物电极高温下选择性安培检测NO。在500 ℃和550℃下，当敏感电极电位为+ 100 mV时，CdCr 2 O 4-管状传感器对NO的响应速度快于NO2。90%的反应 ...更多信息 对100 ppm NO的分解时间短至约100 ppm。500℃下20 s。在0 - 200 ppm范围内，电流响应与NO浓度有很好的相关性。(3)将NaNO 2膜沉积在对电极上，并以NaNO 2为电极材料，制备了一种新型的NO2固体电流型传感器。在150℃下，当传感电极相对于参比Au电极极化至-150 mV时，NO2浓度在10 ppb ~ 1 ppm范围内，流过器件的电流与NO2浓度呈线性关系。(4)进行了半导体氧化物的搜索，以设计对NO的选择性超过NO2的传感器。Bi_2O_3对NO具有很好的选择性，但在所研究的各种氧化物中，其对NO的灵敏度不是很高，NiO被证明是Bi_2O_3提高NO灵敏度的最有效的促进剂。在300℃时，以5 wt % NiO-Bi_2 O_3为敏感元件，在0 ~ 400 ppm范围内对NO具有较好的灵敏度、选择性和响应速率。少

项目成果

N. MIURA: "Solid-State Amperometric No Sensor Based on Stabilized Zirconia and Oxide Electrode"Proc. 11th Int. Conf. on Solid State Ionics. 150-151 (1997)

N. MIURA：“基于稳定氧化锆和氧化物电极的固态电流传感器”Proc。

G. Lu, N. Miura, N. Yamazoe: "High-Temperature Sensors for NO and NO2 Based on Stabilized Zirconia and Spinel-Type Oxide Electrodes"J. Mater. Chem.. 7(8). 1445-1449 (1997)

G. Lu、N. Miura、N. Yamazoe：“基于稳定氧化锆和尖晶石型氧化物电极的 NO 和 NO2 高温传感器”J。

G. Lu, N. Miura, N. Yamazoe: "Stabilized Zirconia-Based Electrochemical Sensors Attached with Oxide Electrode for Detection of NO or NO2"Tech. Digest of 7-IMCS. 112-114 (1998)

G. Lu、N. Miura、N. Yamazoe：“附有氧化物电极的稳定氧化锆基电化学传感器，用于检测 NO 或 NO2”技术。

N. Miura, M. Ono, G. Lu, N. Yamazoe: "Design of Compact Amperometric NO2 Sensor Based on NaィイD1+ィエD1 Conductive Solid Electrolyte"J. Appl. Electrochem.. 28(9). 863-865 (1998)

N. Miura，M. Ono，G. Lu，N. Yamazoe：“基于 NaiD1+IeD1 导电固体电解质的紧凑型 NO2 传感器的设计”J. 应用。 28（9）（1998）。

N.MUURA: "Solid-Satae Amperometric NOx Sensor Using Proton Conductor Operative at Ordinary Temperature"2nd Int,Meet,Pacific Rim Ceramic Soc,. 2. 44-50 (1999)

N.MUURA：“使用质子导体在常温下工作的固态安培氮氧化物传感器”第二届 Int，Meet，Pacific Rim Ceramic Soc，。