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La1-xCaxFe1-yCoyO3对氧气还原的催化活性
Catalytic Activities of La 1-x Ca xFe 1-y Co yO 3 for Oxygen Reduction
【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 = 04 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 La06 Ca04 Fe06 Co04 O3 是适于碱性条件下氧气还原的、综合性能好的催化剂
【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
- 【文献出处】 无机材料学报 ,JOURNAL OF INORGANIC MATERIALS , 编辑部邮箱 ,1999年04期
- 【分类号】TQ426
- 【被引频次】45
- 【下载频次】165