| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen gas sensor having high sensitivity and high accuracy. SOLUTION: This hydrogen gas sensor 1 is composed of a solid electrolyte 11 having proton conductivity, a hydrogen electrode 12 formed on one side of the solid electrolyte 11 and with which a measuring gas having a hydrogen partial pressure to be measured comes into contact an oxygen electrode 13 comprising a metal and a metal oxide formed on the other side of the electrode 11, namely, on the side facing the hydrogen electrode 12 from the back side, and a electromotive force measurement means 14 for measuring an electromotive force between the hydrogen electrode 12 and the oxygen electrode 13. In this hydrogen gas sensor 1, the metal oxide forming the oxygen electrode 13 works as an oxidizing agent, therefore, a proton and an electron are produced from hydrogen near the hydrogen electrode 12 and a metal oxide reaction occurs by the proton and the electron on the oxygen electrode 13. Therefore, detection sensitivity of hydrogen gas is high and detection accuracy is also high. |
