Sodium Borohydride Treatment to Prepare Manganese Oxides with Oxygen Vacancy Defects for Efficient Oxygen Reduction

Manganese oxides are often used as catalysts for oxygen reduction reactions due to their low price and high stability, they have been extensively studied. However, the poor electrical conductivity intrinsic activity of manganese restrict its application in reduction. In this paper, oxide octahedral molecular sieve is research object, performance material adjusted by surface etching treatment sodium borohydride. After being treated with 8 mmol/L borohydride, vacancy content was 26%. The showed best performance, half-wave potential 0.821 V. Tests show that has excellent kinetics. generation appropriate vacancies on directly improves chemical properties surface, regulates ratio Mn3+/Mn4+ nanorod, increases adsorption sites material. On other hand, increase electron transfer rate during process, thereby enhancing activity.