Effect of Preparation Conditions on Properties of Perovskite Oxide La0.6Ca0.4Co0.9Mn0.1O3 AITranslate

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Chinese Library Classification Number:O643[理学—物理化学]

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Perovskite oxide La0.6Ca0.4Co0.9Mn0.1O3 was prepared by sol-gel method under different conditions,and its electrocatalytic properties in bifunctional oxygen electrode was investigated,then the best synthesis conditions were determined.The TG-DSC curves show that the lowest synthesis temperature of La0.6Ca0.4Co0.9Mn0.1O3 is above 600℃.On this basis,the effects of the initial pH value of the solution,the amount of citric acid and the calcination temperature have been studied on the catalytic performance of perovskite oxide bifunctional oxygen electrode.The results of physicochemical characterization and electrochemical performance test of perovskite oxides show that the catalytic activity of perovskite oxides is better when the initial pH of the solution is 5,the molar ratio of metal ions to citric acid is 2∶3,and the calcination temperature is 750℃.