Abstract
Partial substitution of lanthanum with strontium yields lanthanum strontium manganite (La1-xSrxMnO3, 0 < x < 1). In this work, lanthanum strontium manganite catalysts with x = 0, 0.2, 0.4, 0.6 and 0.8 are synthesized and characterized, and their catalytic properties for the oxygen reduction reaction (ORR) are studied both experimentally and theoretically. It is found that the catalyst with x = 0.6 (La0.4Sr0.6MnO3) displays the highest ORR activity. To further improve the catalytic performance of this catalyst, porous La0.4Sr0.6MnO3 is prepared using carbon spheres as pore-forming templates. The results show that use of a moderate amount of carbon spheres helps to improve the ORR activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have