为了提高燃料电池、金属空气电池中氧电极的性能， 本工作合成了 Ｌａ１ － ｘ Ａ′ｘ Ｆｅ１ － ｙ Ｃｏｙ Ｏ３ （ Ａ′＝ Ｃａ 、 Ｓｒ、 Ｂａ） ， 作为氧气还原的催化剂， 制成了氧电极， 在碱性介质中以 Ｈｇ Ｈｇ Ｏ 为参比电极测量了电极的极化曲线， 考察了组成对催化剂的电催化活性和化学稳定性的影响用 Ｂ Ｅ Ｔ 法测量了催化剂的比表面积， 发现ｘ ＝ ０.４ 时， 催化剂的比表面积最大， 同时电催化性能也最强本工作表明 Ｌａ０.６ Ｃａ０.４ Ｆｅ０.６ Ｃｏ０.４ Ｏ３ 是适于碱性条件下氧气还原的、综合性能好的催化剂
To improve the properties of oxygen electrodes of fuel cells and metal-air batteries, La1-xA’xFe1-yCoyO3(A’=Ca, Sr, Ba) were prepared. Oxygen electrode was prepared, in which La1-xA’xFe1-yCoyO3 were used as catalysts for oxygen reduction. In alkaline solution, the polarization curves
of the electrode were measured by using Hg/HgO as a reference electrode. The effect of constitutions on electrocatalytic activities and chemical stability
was studied. The specific surface area of catalysts was measured with BET method. It is found that, when x=0.4, the specific surface area is maximum
and the electrocatalytic activities are the best. It is indicated that La0.6Ca0.4Fe0.6Co0.4O3 is a suitable catalyst for oxygen
reduction in alkaline solutions.
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