Stability of iron single atoms in graphene structures from X-ray absorption spectroscopy data

Abstract

We investigate iron oxidation states and its local environment in graphene nanoflakes (GNFs) as well as those treated with nitric acid using X-ray absorption spectroscopy (XAS). Ppb-concentrated single-atom Fe was found to be intercalated into the structure of GNFs during the synthesis and is highly stabilized between graphene layers.