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溶剂对空气电极催化剂LaNi_0.8Co_0.2O₃性能的影响

Effects of solvent on the performance of air electrode catalyst LaNi_0.8Co_0.2O₃

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【Author】 CAO Xing1,LI Xian-bai1,TANG You-gen2,SONG Yong-jiang2(1.Kingray New Materials Science & Technology Co.,Ltd.,Changsha,Hunan 410012,China;2.College of Chemistry and Chemical Engineering,Central South University,Changsha,Hunan 410083,China)

【机构】金瑞新材料科技股份有限公司；中南大学化学化工学院；

【摘要】以丙酮和乙二醇为溶剂,使用溶胶-凝胶法制备钙钛矿型氧化物LaNi0.8Co0.2O3,并制备空气电极。用XRD、TEM分析催化剂的结构;用极化曲线、计时电流法、交流阻抗法、恒流放电曲线研究催化剂在7 mol/L KOH中的性能。用复合有机溶剂制得的催化剂电化学性能较好,电极电位为-0.4 V(vs.Hg/HgO)时的氧还原电流密度为273 mA/cm2。更多还原

【Abstract】 Perovskite type oxides LaNi0.8Co0.2O3 were prepared via sol-gel method by using acetone and glycol as solvent,then the air electrode was prepared.The structure of the catalyst was analyzed by XRD and TEM.Polarization curves,chronoamperometry,AC impedance method.The galvanostatic discharge curves were used to test the performance of the catalyst in 7 mol/L KOH solution.The catalyst prepared by complex organic solvent had the better electrochemical performance.The oxygen reduction current density was 273 mA/cm2 at the electrode potential of-0.4 V(vs.Hg/HgO).更多还原