论文部分内容阅读
A perovskite-type oxide,La_(0.8)Sr_(0.2)MnO_3,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/cm~2.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.
A perovskite-type oxide, La_ (0.8) Sr_ (0.2) MnO_3, 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) 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 / cm ~ 2.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.