Sp 2 C‐Dominant N‐Doped Carbon Sub‐micrometer Spheres with a Tunable Size: A Versatile Platform for Highly Efficient Oxygen‐Reduction Catalysts

A simple, yet versatile strategy to prepare size-controlled and monodisperse carbon sub-micrometer spheres is developed based on the biomolecule dopamine. Unlike traditional carbon materials, the resulting carbon sub-micrometer spheres contain much less sp3 carbon with high-level electroactive nitrogen. Moreover, metal–carbon hybrid sub-micrometer spheres can be easily obtained, and show highly promising catalytic properties in the oxygen-reduction reaction. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues…