With the increase of heating temperature, the volatile Co species further aggregated into Co NPs on the carbon surface, and finally formed 3D Co nanoparticles-embedded carbon nanotube films (Co/CNFs)
As the heating temperature increases, volatile Co substances further aggregate into Co NPs on the carbon surface, ultimately forming 3D Co nanoparticles embedded in carbon nanotube films (Co/CNFs)
With the increase of heating temperature, volatile Co substances further aggregate on the carbon surface to form Co NPs, and finally 3D Co nanoparticles embedded in carbon nanotube films (Co/CNFs) are formed.