A Single Iron Site Confined In A Graphene Matrix For The
Proven to be highly stable in Ndoped graphene 20 21. Here we report one strategy to achieve a highly dispersed single FeN 4 center with CUS Fe sites confined in a graphene matrix at a large quantity via highenergy ball milling of iron phthalocyanine FePc and graphene nanosheets GNs under controllable conditions. Highenergy