Publication

Abstract : The catalysts play an important role in energy devices including fuel cell and Li-air batteries. Usually, platinum (Pt) and platinum alloy (Pt alloy) are used in these devices, due to their good catalytic performance such as high oxygen reduction reaction (ORR) activity and high onset potential. However, Pt is very expensive in comparison with the other metal and non-metal catalysts, which limits commercialization of energy technologies. Cost-effective perovskite structure transition-metal oxide catalysts have shown reasonably high activity for the ORR as well as high electronic and ionic conductivity.[1] Especially, LaMnO3+δ exhibits the highest ORR activity value among perovskite catalysts because it satisfies the Sabatier's principle as possessing approximately 1 electron in eg band of d orbital.