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。传感器的氢响应已在高达 300℃ 的温度下进行了测试。这项工作的主要发现总结如下： 1．制备了配备Ag粉末或薄膜电极的YSZ氧传感器。薄膜电极通过离子束溅射（IBS）沉积制备。该传感器在200℃到300℃温度范围内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传感器的内参比电极。 2．制造了配备涂漆或 IBS 沉积 Pt 和 Pd 的氢传感器，并检查了 NiiD22iiD2HiiD22iiD2 气体混合物中氢的响应。与采用厚涂电极的传感器相比，采用薄 IBS-Pt 和 -Pd 电极的传感器在气体混合物中的响应速度更快。然而，水溶液中的氢电极反应并未受到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。制作了采用 YSZ 管、Ag-OiiD22ィエD2 内部参比电极和覆盖有 PTFE 扩散膜的氢敏感 Pt 工作电极的氢气传感器，并在 200℃ 至 300℃ 的温度范围内检查了对水溶液中氢气的响应。该传感器在250℃和300℃的温度范围内对氢气浓度的变化表现出快速的能斯特响应。当氧气浓度低于氢气浓度时，溶液中的氧气对传感器电势的影响很小。传感器的电位与溶液 pH 值无关。较少的

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）。