Encapsulate α-MnO₂ nanofiber within graphene layer to tune surface electronic structure for efficient ozone decomposition.

ABSTRACT: Major challenges encountered when developing manganese-based materials for ozone decomposition are related to the low stability and water inactivation. To solve these problems, a hierarchical structure consisted of graphene encapsulating α-MnO₂ nanofiber was developed. The optimized catalyst exhibited a stable ozone conversion efficiency of 80% and excellent stability over 100 h under a relative humidity (RH) of 20%. Even though the RH increased to 50%, the ozone conversion also reached 70%, well beyond the performance of α-MnO₂ nanofiber. Here, surface graphite carbon was activated by capturing the electron from inner unsaturated Mn atoms. The excellent stability originated from the moderate local work function, which compromised the reaction barriers in the adsorpti

SUBMITTER: Zhu G 

PROVIDER: S-EPMC8260790 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature