LaF_3固体电解质电池室温室氢的传感性研究

Sensitivity of LaF_3 Solid Electrolyte Cell to Hydrogen at Room Temperature

用自制的ＬａＦ３多晶粉末作固体电解质，分别以Ｐｔ黑，Ａｎ，Ａｇ，Ｎｉ粉作敏感电极，以Ｓｎ／ＳｎＦ２为参比电极制备半电池，研究其室温下对空气中少量氢的传感性．实验发现，２０℃时以Ｐｔ黑为敏感电极的电池对空气中少量氢的响应很灵敏，最快响应时间为１５ｓ，且电动势与１ｎＰＨ２服从能斯特定律，而以Ａｎ，Ａｇ，Ｎｉ粉为敏感电极的同种电池室温下对空气中少量氢表现为惰性．

A chemical cell was developed using powdered LaF3 as electrolyte with Sn/SnF, as referenceelectrode and platinum black as sensitive electrode for the purpose of sensing a small amount of HZ in air atroom temperature. The results showed that the cell EMF is linear well with mpH, and in accordance to Nernst's law with a fastest response time up to 15s at 20℃,while the cell using An,Ag or Ni powder as sen sitive electrode presents inert in the same applications.