Porous rare earth-transition metal bimetallic oxide nanoparticles oxygen electrocatalyst for rechargeable Zinc-air battery

Background: The design and preparation of efficient nonprecious metal catalysts for the ORR, it is still a big challenge in alkaline media. Therefore, there is a need to develop an efficient electrocatalyst to meet the cur-rent problems such as energy scarcity in society Methods: In this experiment, a series of bimetallic oxide nanoparticle catalysts (SmFeOx@CN) with fairly good morphology, which combine the advantages of rare earths and transition metal oxides, were successfully prepared by using silica dioxide as an encapsulated template and later removed. Significant findings: The bimetallic oxide nanoparticle catalyst produces redox activity that is comparable to that of commercial platinum-carbon catalysts and shows excellent stability, power and energy densities. This excellent performance is owed to the concerted effect of bimetallic oxide nanoparticles and the special electronic layer structure of rare earths. (c) 2022 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers.

Automated summary

Efficient nonprecious metal catalysts for the oxygen reduction reaction (ORR) in alkaline media are still a big challenge. In this study, a series of bimetallic oxide nanoparticle catalysts (SmFeOx@CN) with good morphology were successfully prepared using silica dioxide as an encapsulated template. The catalysts demonstrated comparable redox activity to commercial platinum-carbon catalysts and exhibited excellent stability, power, and energy densities, which can be attributed to the concerted effect of bimetallic oxide nanoparticles and the special electronic layer structure of rare earths.