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Keywords:

  • nitrogen-doped graphene;
  • nitrogen-doped carbon nanotube;
  • nanocomposites;
  • oxygen reduction reaction;
  • hydrothermal process
Thumbnail image of graphical abstract

A new kind of nitrogen-doped graphene/carbon nanotube nanocomposite can be synthesized by a facile hydrothermal process under mild conditions, which exhibits synergistically enhanced electrochemical activity for the oxygen reduction reaction. This research provides a new route to access a metal-free electrocatalyst with high activity under mild conditions.