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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，一种新设计的氢传感器，它是基于一个电化学电池采用氧化钇稳定的氧化锆（YSZ）固体电解质和贵金属工作电极，已被开发。在300℃的高温下考察了该传感器的氢响应。主要研究结果如下：1.制备了YSZ氧传感器，分别采用Ag粉电极和薄膜电极.薄膜电极采用离子束溅射法制备。在200 ~ 300℃温度范围内，传感器对氧分压的变化具有快速的能斯特响应，表明Ag粉和薄膜电极均可作为氢气传感器的内参比电极.制备了涂有或IBS沉积的Pt和Pd的氢传感器，并测试了其对N_（22）D_（22）气体中氢的响应。 ...更多信息混合物进行了检测。在气体混合物中的响应速率是更快的传感器采用薄IBS-Pt和-Pd电极相比，那些采用厚涂电极。然而，水溶液中的氢电极反应不受电极制备方法的差异的影响。Pt在高温水溶液中的耐腐蚀性高于Pd。采用YSZ管、Ag-O_（22）Ag_（22）Ag_（22）D_2内参比电极和PTFE扩散膜覆盖的氢敏Pt工作电极制成氢传感器，并在200 ~ 300℃范围内研究了水溶液中氢的响应。该传感器在250℃ ~ 300℃温度范围内对氢气浓度的变化具有快速的能斯特响应。当溶液中氧浓度低于氢浓度时，氧对传感器电位的影响不大。传感器的电位与溶液pH值无关。