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Synthesis and electrochemical properties of LaCo_(1-y)Mn_yO_3 as bifunctional oxygen electrodes

Lin Shengling,Wu Jiajian,Zhu Weifeng,Yin Houfei,Cao Xu,Chen Chuanxiang(School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China)  
The glycine-nitrate combustion method was used to prepare complex oxide ceramic powders of LaCo1-yMnyO3(y=0~0.5,0.7,0.9).Their structures and sizes were investigated by XRD.Bifunctional oxygen electrodes were made based on the complex powder.Furthermore,the cyclic volt-ampere curves of oxygen were obtained with and without flowing oxygen.The kinetics characteristics of oxygen electrodes were studied.According to the chemical dynamic parameter,activation energy of oxygen reduction and evolution was obtained.The result shows that the synthesized samples are single perovskite phase with the average particle size 14.2~20.2nm.The oxygen electrodes are not completely reversible and have bifunctional catalyst activity.The electrocatalysts of bifunctional oxygen electrode of LaCo1-yMnyO3 are excellent.
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