摘要
利用溶胶-凝胶法制备了钙钛矿型复合氧化物La_(0.6)Sr_(0.4)CoO_3,着重研究了煅烧温度对其在双功能氧电极中电催化性能的影响。采XRD、SEM、BET等分析手段对钙钛矿型复合氧化物La_(0.6)Sr_(0.4)CoO_3进行物相及形貌分析,在三电极体系下绘制了双功能氧电极的阴极和阳极的稳态极化曲线和稳态恒电流曲线。结果表明,提高煅烧温度,有利于减少钙钛矿型La_(0.6)Sr_(0.4)CoO_3中的杂质。当煅烧温度达到800℃时,La_(0.6)Sr_(0.4)CoO_3为纯相钙钛矿型复合氧化物,催化剂的活性最好,双功能氧电极的极化最小且稳定性最佳。
La0.6Sr0.4CoO3 perovskite-type oxide was prepared with sol-gel method, and the effect of calcina- tion temperature on its electrocatalytic properities in bifunctional oxygen electrodes was particularly stud- ied. The phase and morphology of La0.6Sr0.4CoO3 perovskite-type oxide were analyzed by XRD, SEM and BET,and the steady-state polarization curves and steady-state galvanostatic curves of the cathode and an- ode of the bifunctional oxygen electrodes were plotted in a three-electrode system. The results show that increasing the calcination temperature is advantageous for decreasing the impurities in La0.6Sr0.4CoO3 per- ovskite-type oxide. When the calcination temperature reaches 800 ℃, pure La0.6Sr0.4CoO3 perovskite-type oxide is obtained with the highest catalytic activity,and the bifunctional oxygen electrode owns the lowest electrochemical polarization and the highest stability.
作者
于文婉
黄红霞
王成
YU Wen-wan;HUANG Hong-xia;WANG Cheng(Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, Guilin University of Technology, Guilin 541004,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2018年第3期23-28,74,共7页
Rare Metals and Cemented Carbides
基金
广西自然科学基金(2016GXNSFAA380201)
广西电磁化学功能物质重点实验室研究基金(EMFM20161103)
