【摘要】 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更多还原

【Abstract】 To improve the properties of oxygen electrodes of fuel cells and metal air batteries, La 1-x A′ xFe 1-y Co yO 3(A′=Ca, Sr, Ba) were prepared Oxygen electrode was prepared, in which La 1-x A′ xFe 1-y Co yO 3 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 La 0 6 Ca 0 4 Fe 0 6 Co 0 4 O 3 is a suitable catalyst for oxygen reduction in alkaline solutions更多还原