| abstract |
The invention belongs to the research field of energy materials, in particular to a method for improving the oxygen desorption performance of double perovskite oxides. The method of the invention first prepares the metal nitrate aqueous solution of double perovskite oxide; according to the total moles of metal ions: citric acid: EDTA is 1:1.2～1.5:1 ratio, citric acid and EDTA are added into the metal nitrate aqueous solution , add deionized water, stir and dissolve to form a precursor solution; adjust the pH value of the precursor solution to 6.0-7.0, evaporate to dryness in a water bath at 75-85 ℃ under stirring, until it forms a gel and then dry; the dried gel is 350-450 calcined at ℃ for 30 min, and then heated to 800-850 ℃ and calcined for 7-8 h. The present invention proposes for the first time that the pH value has an important influence on the oxygen desorption performance of the double perovskite oxide. Desorption properties. |