Catalytic Activity of Machanochemically Prepared Strontium-Doped Nanostructural Lanthanum Manganite

The fuel cells (FC) are distinguished as generating of distributed energy and are electrochemical devices of low environmental impact. In current work, the strontium-doped lanthanum manganite, a ceramic material used as cathode in solid oxide fuel cells (SOFCs). The nanocrystalline La0.8Sr0.2MnO3 (LSM) was prepared by varying the milling time of planetary mill during the mechanochemical method. After X-ray diffraction confirms the formation of perovskite LSM the cathode powder was made ready from sintered pellets at 1200oC for 4 hours in air. The gas chromatography (GC) test was used in order to study the catalytic activity of porous LSM cathode material in methane gas conversion and oxygen reduction. For investigate the volume percent, size and distribution of porosities secondary electron microscopy (SEM) imaging was utilized. The results of this research confirmed that by increasing grinding time as an important factor in LSM mechanochemical synthesis, the catalytic characteristics as well as pore distribution is modified.

کلیدواژه ها:

SOFC ، LSM cathode ، mechanochemicl synthesis ، nanocrystallite ، catalytic activity