Synthesis of lanthanum compound encapsulated within carbon nanoparticles

Encapsulated forms in multilayered graphitic capsules have been studied by varying the lanthanum compounds filled in the positive graphite electrode. The morphology of these filled nanoparticles was observed by transmission electron microscopy. It was found that the encapsulated forms in nanoparticles varied with the compounds filled in the anode: in the case of a La2O3/graphite, a LaN/graphite, and a LaB6/graphite composite anode, the corresponding encapsulated forms are LaC2, La, and LaB6, respectively.