Preparation of nanometer perovskite-type oxide La0.8Sr0.2MnO3 by organic solvent sol-gel method and capability testing
来源期刊：Rare Metals2008年第2期
论文作者：HU Jie~(a,b) SHAO Guangjie~b HUANG Hao~a XING Guangzhong~a ~aState Key Laboratory of Metastable Materials Science & Technology,Yanshan University,Qinhuangdao ,China ~b Department of Environment and Chemistry,Yanshan University,Qinhuangdao ,China
文章页码：131 - 133
摘 要：<正>A perovskite-type oxide,La0.8Sr0.2MnO3,was synthesized by the organic solvent sol-gel method.The desired metal cations were chelated in a solution by using citric acid as the chelating agent and absolute ethanol as the solvent.The thermal decomposition of the metal carboxylate precursor gels was studied by thermogravimetric/differential thermal analyzer （TG/DTA） and the products derived from calcining the gels were characterized by X-ray diffraction （XRD） and transmission electronic microscope （TEM）.The polarization curves were acquired on an electrochemical workstation （LK98） and the discharge curves were acquired on a testing instrument of batteries （DC-5）,with a constant cur- rent discharge,less than 120 mA/cm2.The results revealed that the nanometer perovskite-type powder with lesser particle size could be achieved with an organic solvent and had a better catalytic activity.
HU Jie~(a,b) SHAO Guangjie~b HUANG Hao~a XING Guangzhong~a ~aState Key Laboratory of Metastable Materials Science & Technology,Yanshan University,Qinhuangdao 066004,China ~b Department of Environment and Chemistry,Yanshan University,Qinhuangdao 066004,China
摘 要：<正>A perovskite-type oxide,La0.8Sr0.2MnO3,was synthesized by the organic solvent sol-gel method.The desired metal cations were chelated in a solution by using citric acid as the chelating agent and absolute ethanol as the solvent.The thermal decomposition of the metal carboxylate precursor gels was studied by thermogravimetric/differential thermal analyzer （TG/DTA） and the products derived from calcining the gels were characterized by X-ray diffraction （XRD） and transmission electronic microscope （TEM）.The polarization curves were acquired on an electrochemical workstation （LK98） and the discharge curves were acquired on a testing instrument of batteries （DC-5）,with a constant cur- rent discharge,less than 120 mA/cm2.The results revealed that the nanometer perovskite-type powder with lesser particle size could be achieved with an organic solvent and had a better catalytic activity.
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