EXHAUST GAS PURIFYING ELEMENT, PRODUCTION THEREOF AND METHOD FOR PURIFYING NITROGEN OXIDES

摘要

PROBLEM TO BE SOLVED: To obtain an exhaust gas purifying element capable of efficiently removing nitrogen oxides from the exhaust gas of combustion, etc., containing excessive oxygen by depositing an oxide thin film on a cathode electrode of the element consisting of an electrode and a solid electrolyte. SOLUTION: This exhaust gas purifying element is formed by depositing a crackles oxide thin film on the cathode electrode of the element consisting of the electrode and the solid electrolyte. As the oxide, CaTiO3 , LaCoO3 SrFeO3 , multiple oxides represented by the composition of La1-y Sry Mo3-z (0<=y<=1.0; 0.1<=Z<=0.5; M=Co, Cu, Fe, Mn) and being substituted derivatives thereof, and YBa2 Cu3 O7-x (0<=x<=0.8) are exemplified. Also the film thickness of the oxide thin film deposited on the electrode is preferably defieced as 0.1-10μm, more preferably as 0.1 to about 2.0μm.