Carbonization of the oxygen participation morphology such material will lose connectivity, which is more conducive to the metal nanoparticles into the gap
The involvement of oxygen during carbide can make the shape of the material less connected, which is more beneficial for metal nanoparticles to enter the void.
The presence of oxygen in the carbonization process will make the morphology of the material lose connectivity, which is more beneficial for the metal nanoparticles to enter the void