Development of Dissolved Hydrogen Sensors for High Temperature Water Systems

高温水系统溶解氢传感器的开发

基本信息

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

项目摘要

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

为了在高温下原位测量水溶液中的氢浓度，开发了一种新设计的氢传感器，该传感器基于采用氧化钇稳定氧化锆（YSZ）固体电解质和贵金属工作电极的电化学电池在高达300℃的温度下测试了传感器的氢响应。这项工作的主要发现总结如下： 1．通过离子束溅射 (IBS) 沉积制备薄膜电极，传感器在 200℃ 至 300℃ 的温度下对氧分压的变化表现出快速的能斯特响应，这表明银粉和薄膜电极均具有良好的性能。薄膜电极可作为氢传感器的内参比电极。 2．制备了涂漆或IBS沉积Pt和Pd的氢传感器，并研究了其对氢的响应。对 N-D22-D2H-D22-D2 气体混合物进行了检查，与使用厚涂层电极的传感器相比，使用薄 IBS-Pt 和 -Pd 电极的传感器在气体混合物中的响应速度更快。 Pt在水溶液中的耐腐蚀性不受电极制备方法差异的影响，Pt在高温水溶液中的耐腐蚀性高于Pd.3。采用 YSZ 管、Ag-O2D22 内部参比电极和覆盖 PTFE 扩散膜的氢敏感 Pt 工作电极已制作完成，并在 200℃ 至 300 ℃ 的温度范围内检查了水溶液中氢的响应。传感器在250℃和300℃的温度范围内对氢气浓度的变化表现出快速和能斯特响应，溶液中的氧气对传感器的影响很小。当氧气浓度低于氢气浓度时，传感器的电位与溶液的 pH 值无关。