钙钛矿型氧化物制备及氧还原电催化性能的研究

钙钛矿型氧化物制备及氧还原电催化性能的研究 PREPARATIONS OF PEROVSKITE OXIDES AND ELECTROCATALYTIC ACTIVITIES FOR OXYGEN REDUCTION 骆培方 first-author 吴智远 周运鸿 查全性 采用碳酸盐沉淀热分解法,柠檬酸固化热分解法和硝酸盐直接混合热分解法分别制备了La 0.5 Sr 0.5 CoO 3 ,LaCoO 3 ,SrCoO 3 等钙钛矿型氧化物,并通过热重分析、x—射线衍射粉末图、BET比表面及比电阻测定,对不同组成的氧化物的制备条件作了比较。采用柠檬酸固化热分解法能在较低的灼烧温度下（600℃）得到比表面较大的LaCoO 3 ,La 0.5 Sr 0.5 CoO 3 钙钛矿型氧化物。混入乙炔黑等导电物质后的La 0.5 Sr 0.5 CoO 3 氧化物电极对氧过原有较好的催化活性。 The carbonate decomposition method, citric acid solidified nitrate decomposition method and mixed nitrates decomposition method were used to prepare La 0.5 Sr 0.5 CoO 3 , LaCoO 3 , SrCoO 3 oxides. The oxides of LaCoO 3 , La 0.5 Sr 0.5 CoO 3 with larger surface were prepared by citric acid solidified nitrate decomposition method at lower temperature（600·C）. Air electrodes made from La 0.5 Sr 0.5 CoO 3 oxide mixed with conductive materials auxh as acetylene black show high electrocatalytic activity for oxygen reduction. 中国科学院科学基金 1986-03-01 2021-04-01 3