Development of Dissolved Hydrogen Sensors for High Temperature Water Systems

高温水系统溶解氢传感器的开发

• 批准号: 09555213
• 负责人: HARA Nobuyoshi
• 金额: $ 7.81万
• 依托单位: Tohoku 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-09555213/
• 关键词: Dissolved hydrogen sensor; High-temperature water; Yttria stabilized zirconia; Solid electrolyte sensor; Nuclear power generator; hydrogen permeation; 水素センサ

For in situ measurements of the concentration of hydrogen in aqueous solutions at elevated temperatures, a newly designed hydrogen sensor, which is based on an electrochemical cell employing a yttria-stabilized zirconia (YSZ) solid electrolyte and a noble metal working electrode, has been developed. The hydrogen response of the sensor has been examined at temperatures as high as 300℃. The principal findings of this work are summarized as follows :1. YSZ oxygen sensors equipped with Ag powder or thin film electrodes were fabricated. The thin film electrodes were prepared by ion-beam-sputter (IBS) deposition. The sensors showed a fast, Nernstian response to changes in oxygen partial pressure at temperatures of 200℃ to 300℃, indicating that both the Ag powder and thin film electrodes can be used as an internal reference electrode of hydrogen sensor.2. Hydrogen sensors equipped with painted or IBS-deposited Pt and Pd were fabricated and the response to hydrogen in NィイD22ィエD2HィイD22ィエD2 gas … More mixtures was examines. The response rate in the gas mixtures was faster for sensors employing thin IBS-Pt and -Pd electrodes compared with those employing thick painted electrodes. However, the hydrogen electrode reaction in aqueous solutions was not affected by the difference in the preparation method of the electrodes. The corrosion resistance of Pt in high temperature aqueous solution was higher than that of Pd.3. Hydrogen sensors employing a YSZ tube, a Ag-OィイD22ィエD2 internal reference electrode, and a hydrogen-sensitive Pt working electrode covered with a PTFE diffusion membrane has been fabricated and the response to hydrogen in aqueous solutions was examined at temperatures over the range of 200℃ to 300℃. The sensors displayed rapid and Nernstian responses to changes in hydrogen concentration in the temperature range of 250℃ and 300℃. Oxygen in solution had little effect on the potential of the sensor, when the concentration of oxygen is lower than that of hydrogen. The potential of the sensor was independent of the solution pH. Less

为了在高温下在线测量水溶液中的氢浓度，设计了一种基于YSZ固体电解液和贵金属工作电极的电化学池的氢传感器。传感器的氢气响应已在高达300℃的温度下进行了检测。本文的主要研究成果如下：1.制备了银粉电极或薄膜电极的YSZ氧传感器。采用离子束溅射(IBS)法制备了薄膜电极。在200℃到300℃的温度范围内，传感器对氧分压的变化表现出快速的能斯特响应，表明银粉电极和薄膜电极都可以作为氢敏传感器的内参比电极。在N-ィイ-D22-ィエ-D2H-ィイ-D22-ィエ-D2气体…中制备了涂覆或IBS沉积的铂、钯氢传感器，并对氢气的响应进行了测试检查了更多的混合物。使用薄的IBS-铂和钯电极的传感器在混合气体中的响应速度比使用厚涂层电极的传感器更快。但是，电极制备方法的不同不影响氢电极在水溶液中的反应。在高温水溶液中，铂的耐蚀性高于钯。采用YSZ管、Ag-OィイD22ィエD2内参比电极和涂有聚四氟乙烯扩散膜的氢敏铂工作电极制作了氢敏传感器，并在200℃~300℃的温度范围内测试了传感器对水溶液中氢气的响应。在250℃和300℃的温度范围内，传感器对氢浓度的变化表现出快速和能斯特的响应。当氧气浓度低于氢气浓度时，溶液中的氧气对传感器的电势影响不大。传感器的电势与溶液的pH值无关。较少

项目成果

Nobuyoshi Hara: "Development of Dissolved Hydrogen Sensors Based on Yttria-Stabilized Zirconia Solid Electrolyte with Noble Metal Electrodes"Journal of the Electrochemical Society. 144・12. 4152-4157 (1997)

原伸义：“基于氧化钇稳定氧化锆固体电解质和贵金属电极的溶解氢传感器的开发”电化学会杂志144・12（1997）。

Nobuyoshi Hara: "Oxygen Response of Yttria-Stabilized Zirconia Sensors in Gaseous and Aqueous Systems"Journal of the Electrochemical Society. 144・12. 4158-4160 (1997)

Nobuyoshi Hara：“气体和水系统中氧化钇稳定的氧化锆传感器的氧响应”电化学学会杂志 144・12（1997 年）。