Tunable and convenient synthesis of highly dispersed Fe-N _x catalysts from graphene-supported Zn-Fe-ZIF for efficient oxygen reduction in acidic media.

ABSTRACT: The development of low-cost, efficient and stable electrocatalysts for the oxygen reduction reaction (ORR) is desirable but remains a great challenge. We report a convenient and efficient synthesis approach of highly dispersed Fe-N _x catalysts for ORR. Typically, Fe-Zn-ZIF (zeolitic imidazolate frameworks) nanocrystals cast as precursor and graphene as supports, highly dispersed Fe-N _x species were fabricated with PVP (polyvinyl pyrrolidone) as surfactant via pyrolysis. With the help of graphene and surfactant, the agglomeration of iron particles has been avoided during pyrolysis, and the size and morphology of ZIF particles intercalating into the graphene layers can be regulated precisely as well. The amount of Fe-N _x active sit

SUBMITTER: Yang L 

PROVIDER: S-EPMC9076514 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature