Study on catalytic performance of LaMnO3 prepared by PMMA template method for oxygen reduction
PMMA microspheres were prepared by PMMA(polyethyl methacrylate)according to the Stober-Frink method,and used as a template agent.With citric acid as a complexing agent and ethanol and distilled wa-ter as solvent,LaMnO3 was prepared by mixing and stirring,precipitating and removing the template agent.Powder X-ray diffraction(XRD),field emission scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and N2 adsorption-desorption were used to characterize and analyze the catalyst sample LaMnO3,and its electrochemical properties were tested.The results show that the porous LaMnO3 with spheri-cal cavity can be prepared using PMMA microspheres as a template,which has good oxygen reduction reaction(ORR)activity,and the specific surface area of 23.005 m2/g is much larger than that of LaMnO3 prepared by co-precipitation.When used as cathode catalyst materials for aluminum air batteries,LaMnO3 prepared using PMMA microspheres has more stable constant current discharge and higher discharge voltage than that prepared by co precipitation method.
PMMA template methodLaMnO3ORROERcathode catalyst for aluminum-air battery
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