Development of dissolved hydrogen sensors based on yttria-stabilized zirconia solid electrolyte with noble metal electrodes
Development of dissolved hydrogen sensors based on yttria-stabilized zirconia solid electrolyte with noble metal electrodes
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DOI：
10.1149/1.1838158
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发表时间：
1997-12-01
影响因子：
3.9
通讯作者：
Macdonald, DD
中科院分区：
文献类型：
--
作者：
Hara, N;Macdonald, DD
研制了一种氢传感器，用于在高温下原位测量水溶液中氢的浓度。该传感器基于电化学电池，采用钇稳定的氧化锆（9% Y2O3）固体电解质，Ag-O-2（空气中）参比电极和覆盖聚四氟乙烯-乙基膜的贵金属工作电极（Pt或Pd）。传感器对氢气的响应已经在温度高达300℃的气体混合物和水溶液中进行了测试，氢气浓度范围分别为0.001至100%或7.61 × 10（-6）至7.61 × 10(-4) mol/kg。该传感器对气体混合物和水溶液中氢浓度的变化都显示出快速的反应。传感器的测量电位与氢浓度的对数呈线性关系（2.303RT/2F）。当氧浓度低于氢浓度时，溶液中氧对传感器电位的影响较小，而混合气体中氧浓度对传感器电位的影响较大。传感器的电位不受溶液pH值的影响。
A hydrogen sensor has been developed for in situ measurements of the concentration of hydrogen in aqueous solutions at elevated temperatures. The sensor was based on an electrochemical cell employing an yttria-stabilized zirconia (9% Y2O3) solid electrolyte, a Ag-O-2 (in air) reference electrode, and a noble metal working electrode (Pt or Pd) covered with a polytetrafluorene-ethyl membrane. The response of the sensor to hydrogen has been examined in gas mixtures and aqueous solutions at temperatures as high as 300 degrees C, and for hydrogen concentrations ranging from 0.001 to 100% or 7.61 x 10(-6) to 7.61 x 10(-4) mol/kg, respectively. The sensor displayed rapid responses to changes in concentration of hydrogen in both gas mixtures and aqueous solutions. Linear relationships with Nernstian slopes (2.303RT/2F) were observed between the measured potential of the sensor and the logarithm of the hydrogen concentration. Oxygen in solution had little effect on the potential of the sensor when the concentration of oxygen was lower than that of hydrogen, while there was a significant change in the potential with oxygen concentration in gas mixtures. The potential of the sensor was not affected by the pH of the solution.